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Temperature polymers

Flow processes iaside the spinneret are governed by shear viscosity and shear rate. PET is a non-Newtonian elastic fluid. Spinning filament tension and molecular orientation depend on polymer temperature and viscosity, spinneret capillary diameter and length, spin speed, rate of filament cooling, inertia, and air drag (69,70). These variables combine to attenuate the fiber and orient and sometimes crystallize the molecular chains (71). [Pg.329]

At various cross-sections along the flow direction, (i) the polymer velocity profile, (ii) polymer temperature profile, (iii) metal temperature profile, and (iv) pressure drop are all computed. Because the pressure at the exit is known, the absolute pressure profile along the flow direction can also be determined. [Pg.529]

The associated temperature profiles are shown in Figures 10 through 12. Metal in contact with Dowtherm is at 240°C, whereas in the middle of the plate, the metal temperature ranges from 226 to 234°C. Because of this effect, as well as the relatively low thermal conductivity of polymer melt, large temperature gradients exist along the y and z directions. At the walls the polymer temperature reaches 240°C, whereas at the center of the channel the polymer temperature is only 213°C, at the outlet. [Pg.531]

Here, L total is the depth of the etched hole per pulse and is assumed to be the sum of photochemical and photothermal contributions, Tphoto and Thermal, respectively 0Ceff is the effective photon absorption coefficient of the medium and can vary with laser emission characteristics, e g., photon density Fis the incident laser fluence Fth is the medium s threshold fluence A and F are the effective frequency factor with units of pm/pulse and the effective activation energy with units of J/cm2, respectively, for the zeroth-order thermal rate constant F0, comparable in magnitude to Fth, is important only at low fluences.64 Equation (5) is obtained after assuming that the polymer temperature T in the laser-exposed region of mass mp and the thermal rate constant k are given, respectively, as... [Pg.9]

The rate of energy dissipation, Q, is related to the adiabatic polymer temperature increase as follows ... [Pg.66]

Usually the function [Cn) M] (intrinsic viscosity times molecular weight) is used to represent hydrodynamic volume which is plotted versus elution volume. For such a plot the calibration curves of many polymers fall on the same line irrespective of polymer chemical type. Universal calibration methodology usually requires knowledge of Mark-Houwink constants for the polymer/ temperature/solvent system under study. [Pg.77]

Degradation in bulk. Davis and Golden (85) have studied the degradation of PTHF in bulk at various temperatures. The polymers that they studied were prepared using a THF/PF5 complex either in an open flask (polymer A) or in vacuum with exposure to air during the work up (polymer V). The intrinsic viscosity of polymer A. heated at fixed temperatures up to 150° C in a sealed system, fell rapidly to a constant value. Polymer V behaved similarly but the decrease was considerably smaller. When heated in air at a fixed temperature the viscosity of both polymers decreased continuously with eventual destruction of the polymer. Temperatures well in excess of 150° C were required for complete degradation of polymer A or V in vacuum. [Pg.577]

Polymer Temperature (°C) Mass % of acetic acid in the feed Permeation rate (kg/m2 h) Separation factor (a) Ref. no. [Pg.56]

The chemiluminescence intensity is dependent on polymer, temperature and geometry. However, the relationship between the oxidation rate and the chemiluminescence intensity is not known and very few conclusions can be drawn from comparing light intensities between samples. In order to use chemiluminescence to determine the degree of oxidation, a correlation curve using a quantitative technique has to be constructed under the same ageing condition. [Pg.172]

The relation of abrasion to friction appears from Figure 7.31, in which the abrasion is given as a function of temperature for some crystalline polymers. Temperature increase causes, from a certain temperature, a drastic increase in abrasion due to sticking together of the surfaces. [Pg.142]

The pattern can be obtained from the polymer temperature or concentration variations in addition to the change of G°N. The relaxation function may be too complicated a mathematical expression ever to be calculated, nonetheless, it obeys a property of invariance which allows the superposition of all normalised relaxation curves to one another by adjusting a suitable factor to the time scale of each curve. The time shift factor is found to obey the equation... [Pg.312]

Wang, C.L., Hirata, T., Maurer, F.H.J., Eldrup, M., Pedersen, N. J. (1998) Free- volume distribution and positronium formation in amorphous polymers temperature and positron-irradiation-time dependence . J. Chem. Phys. 108(11), 4654. [Pg.392]

Number average molecular weight of the polymer Weight average molecular weight of the polymer Temperature, in kelvins WFAC... [Pg.135]

At sufficiently low temperatures a polymer will be a hard, brittle material with a modulus greater than lO N m (10 dyn/cm ). This is the glassy region. The tensile modulus is a function of the polymer temperature and is a useful guide to mechanical behavior. Figure I 1-8 shows a typical modulus-temperature curve for an amorphous polymer. [Pg.394]

Stahelin, M., Walsh, C. A., Borland, D. M., Miller, R. D., Twieg, R. J., and Volksen, W. Orientational decay in poled 2nd-order nonlinear-optical guest-host polymers Temperature dependence and effects of poling geometry. J. Appl. Phys. vol. 73 (no. 12), 15 [une 1993, p. 8471-8479. [Pg.304]

Figure 7. Adsorption isotherms of 1,4-dioxane, ethanol, heptane, and octane on cellulose polymer. Temperatures were 24.3 C, except for the octane isotherm, which was obtained at 25 C. Figure 7. Adsorption isotherms of 1,4-dioxane, ethanol, heptane, and octane on cellulose polymer. Temperatures were 24.3 C, except for the octane isotherm, which was obtained at 25 C.
Even allowing disparities due to the variation in reaction conditions used with the different polymers (temperature, stirring mode), this table highlights the following points ... [Pg.614]

Various CBAs are used in producing cellular polymers. They are either organic or inorganic compounds that decompose under the influence of heat to yield at least one gaseous decomposition product. They are either exothermic or endothermic but the effect of heat release or heat intake should not be large enough to cause polymer degradation or polymer temperature control. Table 3 shows the physical properties of potential CBA. [Pg.245]


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Acrylic core-shell polymers, glass-transition temperature

Amorphous polymers glass transition temperature

Amorphous polymers temperature

Amorphous polymers temperature/pressure dependence

Amorphous polymers time-temperature superposition

Anhydrous Proton-Conducting Polymers for High-Temperature PEMFCs

Aromatic polymers, high-temperature

Atactic polymers, glass transition temperatures

Blended polymers glass transition temperature

Blending miscible high temperature polymers

Carbohydrate polymers, glass transition temperature

Carbon Materials in Low-Temperature Polymer Electrolyte Membrane Fuel Cells

Ceiling temperature polymer thermodynamics

Characterization methods for high temperature polymer blends

Composite polymer electrolytes temperature

Conductance, polymer electrical properties temperature

Conducting polymer temperature-dependence

Conductive Electroactive Polymers temperature

Cooperative hydration in solutions of temperature-responsive polymers

Critical solution temperatures, polymers

Cross-linked polymers equilibrium melting temperature

Cross-linked polymers temperature

Crystalline polymer, intermediate temperature

Crystalline polymers glass transition temperature

Crystalline polymers melting temperature

Crystalline polymers temperature

Crystalline polymers temperature dependence

Diene type polymers melting temperatures

Doped conjugated polymers temperature dependence

Effect of Temperature on Polymer Solutions

Effect of Temperature on Polymer Viscosity

Effect of Temperature on Polymers

Epoxy polymers glass transition temperatures

Equilibrium melting temperature, of polymer

Equilibrium melting temperature, of polymer crystals

Equilibrium melting temperature, polymer

Equilibrium melting temperature, polymer crystal nucleation

Glass Transition Temperature for Selected Polymers

Glass transition temperature factors that affect, polymers

Glass transition temperature ferroelectric polymers

Glass transition temperature glassy polymers, thermal analysis

Glass transition temperature natural polymers

Glass transition temperature polymer brushes

Glass transition temperature polymer lattices

Glass transition temperature polymer structure effect

Glass transition temperature thermotropic liquid crystal polymer

Glass transition temperature thin polymer films

Glass transition temperature vinyl polymers

Glass transition temperature, glassy and rubbery polymers

Glass transition temperature, in polymers

Glass transition temperature, of polymer

Glass transition temperature, phase polymers

Glass transition temperature, polymer

Glass transition temperature, polymer packaging materials

Glass transition temperatures hyperbranched polymer structure

Glass transition temperatures metallocene polymers

Glass transition temperatures, poly -liquid-crystalline polymer

Glass-transition temperature bulk polymer motions below

Glassy polymers temperature dependence

Glycolic acid polymers temperature

Grafting-from methods temperature-responsive polymer

High Performance Polymers glass transition temperatures

High Temperature Performance of Polymer Composites, First Edition. Yu Bai and Thomas Keller

High Temperature Polymers polyquinolines

High Temperature Polymers potential advantages

High Temperature-Resistant Polymers

High glass transition temperature polymers

High glass transition temperature polymers development

High temperature adhesives other polymers

High temperature plastics (polymers, resins

High temperature polymer blends

High temperature polymer blends aerospace applications

High temperature polymer blends applications

High temperature polymer blends fuel cell membrane

High temperature polymer blends membrane applications

High temperature polymers definition

High temperature polymers thermoplastic

High temperature solid polymer

High temperature solid polymer electrolytes

High-Temperature Requirements of the Base Epoxy Polymer

High-Temperature and Fire-Resistant Polymers

High-temperature polymer Diels-Alder reaction

High-temperature polymer ceramic

High-temperature polymer chemical structures

High-temperature polymer coordination

High-temperature polymer cycloaddition

High-temperature polymer electrolyte

High-temperature polymer electrolyte fuel

High-temperature polymer electrolyte fuel MEAs)

High-temperature polymer electrolyte fuel cell

High-temperature polymer electrolyte fuel cell HT-PEFC)

High-temperature polymer electrolyte fuel membrane electrode assemblies

High-temperature polymer electrolyte fuel oxygen reduction reaction

High-temperature polymer electrolyte fuel proton conductivity mechanism

High-temperature polymer electrolyte fuel underlying process

High-temperature polymer electrolyte membrane fuel cells

High-temperature polymer poly

High-temperature polymer poly sulfide

High-temperature polymer polyamide

High-temperature polymer polybenzimidazole

High-temperature polymer polybenzoxazole

High-temperature polymer polycarbonate

High-temperature polymer polyether

High-temperature polymer polyimide

High-temperature polymer polyphosphazene

High-temperature polymer polyquinoline

High-temperature polymer polyquinoxaline

High-temperature polymer polysiloxane

High-temperature polymer polysulfone

High-temperature polymer requirements

High-temperature polymer silicate

High-temperature polymers

High-temperature polymers co-ordination

High-temperature polymers cross-linked organic

High-temperature polymers fluorine-containing

High-temperature polymers inorganic

High-temperature polymers ladder

High-temperature polymers linear with p-phenylene groups and other

High-temperature polymers ring structures

High-temperature polymers spiro

High-temperature polymers, desirable

High-temperature polymers, desirable properties

High-temperature polymers, dielectric

High-temperature polymers, dielectric applications

High-temperature polymers, metal

High-temperature polymers, metal diffusion during metallization

High-temperature polymers, synthesis

High-temperature proton exchange acid-base polymer membrane

High-temperature sulfone polymers

High-temperature sulfone polymers structure

High-temperature, oxidative stability polymers

Hydrocarbon polymers temperature PEMFC

Hyperbranched polymer electrolyte high temperature fuel cells

Hyperbranched polymer electrolytes for high temperature fuel cells

Ignition, polymer flammability temperature

Interpenetrating polymer network Glass transition temperatures

Introduction to high temperature polymer blends

Inverse temperature dependence polymer solubilities

Isotactic polymers, glass transition temperatures

Issues in blending polysulfone with other high temperature polymers

Ketone polymers glass transition temperature effects

Key types of temperature-responsive polymers in aqueous solution

Lattice calculations polymer pressure-volume-temperature data

Layered polymers, glass transition temperatures

Linear polymers glass transition temperature

Liquid crystal polymers (LCPs) as a reinforcement in high temperature polymer blends

Lower critical solution temperature , polymer blend phase separation

Lower critical solution temperature polymers

Melting temperature of polymer crystals

Melting temperature of polymers

Melting temperature polymer blends

Melting temperature, polymer crystal

Melting temperature, polymer crystal nucleation

Melting-transition temperature polymer heat capacity

Melting-transition temperature polymer thermodynamics, first-order

Metallization of high-temperature polymers

Micelles polymer micelle, temperature triggered

Miscible polymers above room temperature

Miscible polymers having lower critical solution temperature

Miscible polymers solution temperatures

Negative temperature-sensitive polymers

Nucleation, polymer crystallization temperature dependence, lamellar

Onset temperature, polymer glass formation

Optimum cutting temperature polymer

Orientation stability polymer glass transition temperature

Other High-Temperature Polymers

Phase separation, polymer mixtures temperature

Phase transition temperatures added polymers

Phase transition temperatures polymers

Plasma polymer deposition, measurement temperature

Plasticized polymers glass transition temperature

Plug temperature Polymer

Poly high-temperature aromatic polymer

Poly various temperatures, polymer-metal

Polybenzimidazole (PBI) high temperature polymers and blends

Polybenzimidazole Based High Temperature Polymer Electrolytes

Polyimide various temperatures, polymer-metal

Polymer Membranes for High Temperatures

Polymer blends glass transition temperatures

Polymer blends temperature

Polymer chains, determination transition temperature

Polymer complex temperature-responsive

Polymer composition, temperature control

Polymer crystallization temperature-dependence curve

Polymer decomposition temperature

Polymer dynamics time-temperature superpositioning

Polymer electrolyte fuel cells temperature distribution

Polymer electrolytes operational temperature

Polymer electrolytes temperature dependence

Polymer electrolytes, related temperature

Polymer glass formation temperature characteristics

Polymer glass formation temperature dependence

Polymer glass formation temperature effects

Polymer glass transition temperature consolidation

Polymer groups temperature sensitive

Polymer high temperature specialty

Polymer high temperature, reactive oligomer

Polymer high-temperature melting

Polymer lower critical temperature

Polymer melt transition temperature

Polymer melting characteristic temperatures

Polymer melting temperature

Polymer processing temperature dependence

Polymer science glass transition temperature

Polymer science melt temperature

Polymer science melting temperature

Polymer service temperature

Polymer solution temperature dependence

Polymer solutions critical solution temperatures

Polymer structure temperature

Polymer synthesis glass transition temperatures

Polymer temperature resistance

Polymer temperature, effect

Polymer temperature-dependent switching

Polymer, thermal property glass transition temperature

Polymer, thermal property softening temperature

Polymer-Electrolyte temperature

Polymer-blend thin films temperature dependence

Polymer-diluent mixtures melting temperatures

Polymer-diluent mixtures temperature

Polymer-diluent mixtures temperature dependence

Polymers Vicat softening temperature

Polymers characteristic temperature

Polymers for use at High Temperatures

Polymers glass temperature

Polymers glass transition temperatur

Polymers in Poor Solvents or at Low Critical Solubility Temperature

Polymers melting temperature, factors affecting

Polymers polysaccharide, temperature

Polymers structure complexity testing temperature

Polymers temperature dependence

Polymers temperature tolerance

Polymers temperature-resistant

Polymers transition temperatures

Polymers, high-temperature capabilities

Polymers, liquid crystalline glass transition temperature

Polymers, liquid crystalline isotropization temperature

Polysilane polymers glass transition temperatures

Polysulfones as a reinforcement in high temperature polymer blends

Positive temperature-sensitive polymers

Pressure-Volume-Temperature Relationship for Polymer Melts

Pressure-Volume-Temperature Relationships for Polymer

Pressure-volume-temperature data Amorphous polymers

Relationship between glass transition temperature and melting point of polymers

Requirements for High-Temperature Polymers

Research high-temperature polymer electrolyte fuel

Resistance, polymer electrical properties temperature

Rheological analysis, polymers glass transition temperatures

Rubbery polymer membrane temperature dependence

Semicrystalline polymers glass transition temperature

Siloxane-type polymers glass transition temperature

Soluble polymers with high glass transition temperatures from

Solvents polymers, critical solution temperatures

Stimulus type temperature-responsive polymers

Syndiotactic polymers, glass transition temperatures

Temperature Dependence for Amorphous Polymers

Temperature Dependence for Semi-Crystalline Polymers

Temperature and polymer

Temperature dependence liquid/polymer gels

Temperature dependence lithium polymer batteries

Temperature dependence main chain crystalline polymers

Temperature dependence of the shift factor for several polymers

Temperature dependence polymer brushes

Temperature dependence polymer crystal growth

Temperature dependence polymer electricity

Temperature dependence polymer thermal properties, specific heat

Temperature dependence polymer thermodynamics

Temperature dependence polymer weathering

Temperature dependence, ferroelectric polymers

Temperature dependence, polymer crystal

Temperature dependence, polymer crystal crystallization kinetics

Temperature dependence, polymer crystal lamellar thickness

Temperature dependence, polymer crystal nucleation

Temperature effects on polymer

Temperature for polymers

Temperature metal coordination polymers

Temperature of Polymer Crystals

Temperature on Polymer Oxidation

Temperature polymer blend phase separation

Temperature polymer degradation

Temperature polymer nanocomposites

Temperature polymer properties affected

Temperature polymer synthesis

Temperature polymer-salt complexes

Temperature stable polymers

Temperature-composition phase diagram polymer solution

Temperature-modulated differential scanning calorimetry , polymer

Temperature-responsive polymer

Temperature-responsive polymer irradiation

Temperature-responsive polymer vesicles

Temperature-responsive polymers amide)

Temperature-responsive polymers diagrams

Temperature-responsive polymers for cell culture and tissue engineering applications

Temperature-responsive polymers methacrylate

Temperature-responsive polymers polarity

Temperature-responsive polymers properties, synthesis and applications

Temperature-responsive polymers schematic representation

Temperature-responsive polymers selected applications

Temperature-responsive polymers shape-memory polymer

Temperature-responsive thermoresponsive) polymer

Temperature-sensitive polymers

Temperature-sensitive polymers Pluronics

Temperature-sensitive polymers acid)

Temperature-sensitive polymers chemical structure

Temperature-sensitive polymers chitosan

Temperature-sensitive polymers poly

Temperature-sensitive polymers properties

Thermo-responsive polymers lower critical solution temperature

Thermo-responsive polymers temperature sensitivity

Thermo-responsive polymers upper critical solution temperature

Thermodynamic equilibrium melting temperature of polymer crystals

Thermodynamics high temperature polymer blends

Thermodynamics of high temperature polymer blends

Time-Temperature Superposition in Miscible Polymer Blends

Time-temperature equivalence polymers

Upper critical solution temperature polymer blends

Upper critical solution temperature polymers

Variable temperature polymers

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