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Density polyethylene

Fig. 15. Oxygen permeability versus 1/specific free volume at 25 °C (30). 1. Polybutadiene 2. polyethylene (density 0.922) 3. polycarbonate 4. polystyrene 5. styrene-acrylonitrile 6. poly(ethylene terephthalate) 7. acrylonitrile barrier polymer 8. poly(methyl methacrylate) 9. poly(vinyl chloride) 10. acrylonitrile barrier polymer 11. vinyUdene chloride copolymer 12. polymethacrylonitrile and 13. polyacrylonitrile. See Table 1 for unit conversions. Fig. 15. Oxygen permeability versus 1/specific free volume at 25 °C (30). 1. Polybutadiene 2. polyethylene (density 0.922) 3. polycarbonate 4. polystyrene 5. styrene-acrylonitrile 6. poly(ethylene terephthalate) 7. acrylonitrile barrier polymer 8. poly(methyl methacrylate) 9. poly(vinyl chloride) 10. acrylonitrile barrier polymer 11. vinyUdene chloride copolymer 12. polymethacrylonitrile and 13. polyacrylonitrile. See Table 1 for unit conversions.
Figure 11 Shear creep of polyethylene (density = 0.950) at different loads after 10 min, and as a function of applied stress. Deviation firm the value of 1.0 indicates a dependence of creep compliance on load. Figure 11 Shear creep of polyethylene (density = 0.950) at different loads after 10 min, and as a function of applied stress. Deviation firm the value of 1.0 indicates a dependence of creep compliance on load.
Estimate the bulk modulus of a medium density polyethylene, density 0.95 g/cm3 (degree of crystallinity 70%) by means of the three methods available. [Pg.393]

The development of the concepts of run number, average sequence lengths and triad distributions would be of little more than academic interest if they could not be usefully applied. The concept of run number is most valuable in a consideration of the effect of comonomer content versus branch length in affecting polyethylene density. The following section utilizes the run number in a correlation with a number of polyethylene physical properties. [Pg.143]

Figure 6.1 A correlation between polyethylene density and its flexural modulus. All materials are products of Chevron Phillips Chemical Company (see text). LDPE, LLDPE, and HDPE are shown with densities of 0.917-0.925, 0.918, and 0.943-0.964, respectively. Figure 6.1 A correlation between polyethylene density and its flexural modulus. All materials are products of Chevron Phillips Chemical Company (see text). LDPE, LLDPE, and HDPE are shown with densities of 0.917-0.925, 0.918, and 0.943-0.964, respectively.
There are no data available on the effect of WPC density on the slip coefficient. However, it is known that polyethylene of lower density has a better traction than that of a higher density. In other words, HDPE is characterized by a low coefficients of friction, and the higher the density (specific gravity), the lower the static (and dynamic) coefficient of friction. For polyethylene density of 0.915 g/cm, coefficient of friction equals to 0.50 for 0.932 g/cm, it is equal to 0.30, and for 0.965 g/cm, it is equal to 0.10 [3]. [Pg.211]

TABLE 6.16 Polyethylene density determined according to ASTM D 1505 for four molded samples in 22 laboratories... [Pg.221]

Besides water absorption, another approach for estimations of an inner volume of composites is as follows. Let us consider two composite materials, Trex and Geo-Deck. Trex composites consists of two major ingredients (50 50), that is, polyethylene (density 0.94 g/cm ) and wood flour (density 1.30 g/cm ). Hence, the overall specihc gravity of Trex composites should be 1.12 g/cm (0.94 X 0.5 + 1.30 X 0.5). In reality, it is 0.94 g/cm If we assume that the difference between the two figures is due to porosity, the latter is equal to 19%. That is, about one-fifth of the whole volume of the composite material is open for oxygen to destroy plastic from within the material. [Pg.504]

The density of amorphous polythene is approximately 810kgm . Estimate the crystallinity of low-density polyethylene, density 920 kg m medium-density polyethylene, density 933 kg m and high-den-sity polyethylene, density 950kgm . P ote the density of crystalline polyethylene is given in Question 6.43.]... [Pg.201]

Degradation prodncts from macrolitter have different properties at sea, different effects and different futnies from the original products. Eventually, they form microparticles, usually made of plastic, which constitute a veiy important aspect of the problem of marine litter. They comprise an assembly of objects of varying size, shape, color, density and chemical composition [HID 12]. With densities ranging from 0.8 to 1.4 g cm", the plastics in the sea and on the surface are mainly polyethylene (density 0.92-0.97 g cm ), polypropylenes (0.85-0.94 g cm ) and polystyrenes (from less than 0.05 in the case of foamed polystyrene to 1.00 g cm ) [LES 11]. The denser plastics such as poly (vinyl chloride) (PVC) and polycarbonates, if they do not aggregate with the organic material, tend to sink. [Pg.31]

Figure 2.14 Variation of polyethylene density >vith crystallinity. With boundaries of PE classes. Figure 2.14 Variation of polyethylene density >vith crystallinity. With boundaries of PE classes.
Talc is used as a nucleating agent for linear low density polyethylene (density below 940 g/cm ). The amoimt used was 150 ppm. ... [Pg.147]

Formulation example selection of chromium/silica catalysts, Ziegler-Natta catalysts, or metallocene catalysts makes it possible to achieve low degree of branching required to obtain high density polyethylene (density >0.94), paraffin or cycioparaffin are used as diiuents ... [Pg.156]

Figure 3.7 Effect of short-chain branches on polyethylene density and crystaUiiiity. (o) Methyl branch from ethylene/propylene copolymers ( ) Ethyl branch from ethylene/1-... Figure 3.7 Effect of short-chain branches on polyethylene density and crystaUiiiity. (o) Methyl branch from ethylene/propylene copolymers ( ) Ethyl branch from ethylene/1-...
Figures 3.42 and 3.43 summarize the catalyst activity and the polyethylene density as a function of chromium content, respectively, for each type of catalyst. The polymerization data for each of the catalysts is summarized in Table 3.14. Figures 3.42 and 3.43 summarize the catalyst activity and the polyethylene density as a function of chromium content, respectively, for each type of catalyst. The polymerization data for each of the catalysts is summarized in Table 3.14.
Ethylene/1-octene copolymers containing approximately 10-50 wt% 1 -octene with corresponding polyethylene densities of 0.91-0.85 g/cc and Melt Index (I values of 0.2-30 dg/min, are new compositions that are... [Pg.206]

Examination of Figure 5.8 shows that the time to failure increases from about 50 hours to almost 10,000 hours as the polyethylene density is lowered from 0.96 g/cc to 0.95 g/cc, respectively. [Pg.258]

Figure 5.8 Effect of polyethylene density on load-bearing ability with a 20,000 psi static load - Melt Index ca. 0.2-0.4 [22]. Figure 5.8 Effect of polyethylene density on load-bearing ability with a 20,000 psi static load - Melt Index ca. 0.2-0.4 [22].
The examples provided in U.S. Patent 4,101,289 demonstrate that polyethylene may be produced with this particular reactor over a wide range of molecular weights and molecular weight distributions, as shown by polydispersity values (Mw/Mn) ranging from about 7.6 to 17.0. Both titanium-based catalysts and Cr-based catalysts were evaluated. Typical ethylene polymerization conditions were 171 °F at one end of the reactor and 181°F at the other end of the reactor, with total reactor pressure of 400 psig, and propylene was used as a comonomer to control polyethylene density. [Pg.282]


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Bimodal distribution, high density polyethylene molecular weight

Blends medium-density polyethylene

Blow moulding high-density polyethylene

Branching in high-density polyethylene

Branching in low density polyethylene

Commercial High-Density Polyethylene, Properties, and Manufacture

Contact Angles high density polyethylene

Conventional Low Density Polyethylene

Cooling density polyethylene

Coordination polymerization high density polyethylene

Cross-linked high-density polyethylene

Cross-linked low-density polyethylene

Degradable low-density polyethylene

Degradation density polyethylene

Density Polyethylene (LDPE)

Density Polyethylene (MDPE)

Density Polyethylene - LDPE - Chapter

Density Polyethylene Foams

Density of polyethylene

Ethylene derivatives high density polyethylene

Extrusion high-density polyethylene

Films high-density polyethylene

Films medium-density polyethylene

Free-Radical Polymerization of Low-Density Polyethylene (LDPE)

HDPE (See High-density polyethylene

High Density Polyethylene (HDDE)-Alumina Composites

High Density Polyethylene - HDPE - Chapter

High density polyethylene Semicrystalline polymers, properties

High density polyethylene absorbance

High density polyethylene agricultural applications

High density polyethylene apphcations

High density polyethylene barrier properties

High density polyethylene bottle recycling

High density polyethylene bottles

High density polyethylene characteristic

High density polyethylene combustion

High density polyethylene commercial

High density polyethylene complex viscosity

High density polyethylene containers

High density polyethylene correspondence

High density polyethylene discovery

High density polyethylene etching

High density polyethylene experimental

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High density polyethylene fibers

High density polyethylene flammability

High density polyethylene fuel tanks

High density polyethylene irradiation method

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High density polyethylene measurements

High density polyethylene mechanical properties

High density polyethylene microhardness

High density polyethylene microporous membranes

High density polyethylene milk containers

High density polyethylene modelling

High density polyethylene normal stress difference

High density polyethylene oxidation

High density polyethylene photo-oxidative degradation

High density polyethylene single crystals

High density polyethylene staining

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High density polyethylene, HDPE additives

High density polyethylene, HDPE composites

High density polyethylene, HDPE coordination polymerization

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High density polyethylene, HDPE nanocomposites

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High density polyethylenes HDPEs)

High pressure, low-density polyethylenes

High-Density Polyethylene (HDPE) Resins

High-Density Polyethylene Foams

High-Density Polyethylene, Properties and Manufacture

High-density polyethylen

High-density polyethylene

High-density polyethylene (HDPE

High-density polyethylene (See Polyethylenes

High-density polyethylene , manufacture

High-density polyethylene , production

High-density polyethylene /isotactic

High-density polyethylene 1-hexene production

High-density polyethylene Chemical Company

High-density polyethylene Marlex

High-density polyethylene Subject

High-density polyethylene Tyvek

High-density polyethylene Ziegler

High-density polyethylene abrasion resistance

High-density polyethylene and poly(vinyl

High-density polyethylene applications

High-density polyethylene behavior

High-density polyethylene bimodal

High-density polyethylene blends

High-density polyethylene chemical structure

High-density polyethylene chromium catalyst

High-density polyethylene commercial introduction

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High-density polyethylene crystalline order

High-density polyethylene crystallinity

High-density polyethylene disadvantages

High-density polyethylene elongation

High-density polyethylene elongation retention

High-density polyethylene ethene catalysts

High-density polyethylene foam resins

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High-density polyethylene impact strength

High-density polyethylene liners

High-density polyethylene macromolecules

High-density polyethylene matrix

High-density polyethylene melt flow rate

High-density polyethylene metals

High-density polyethylene method

High-density polyethylene molecular weight

High-density polyethylene molecular weight distribution

High-density polyethylene nucleating agents

High-density polyethylene overview

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High-density polyethylene permeability

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High-density polyethylene property correlation

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High-density polyethylene specific volume

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High-density polyethylene with aluminum alkyls

High-density polyethylene, molecular

High-density polyethylene, molecular antioxidant

High-density polyethylene, molecular weight averages with

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High-density polyethylene, small-angle

High-density polyethylene, small-angle scattering

High-density polyethylene, synthesis

High-density polyethylene-alumina composites

High-density polyethylene-ethylene vinyl

High-density polyethylene-ethylene vinyl acetate-clay nanocomposites

High-density polyethylene/epoxy polymer

High-density polyethylenes. See

Injection moulding high-density polyethylene

Irradiation high density polyethylene

Isotactic polypropylene/high density polyethylene blends

LDPE (See Low-density polyethylene

LLDPE (See Linear low-density polyethylene

LLDPE density polyethylene

Linear density polyethylene

Linear high-density polyethylene

Linear high-density polyethylene discovery

Linear low density polyethylen

Linear low density polyethylene composites

Linear low-density polyethylene

Linear low-density polyethylene (LDPE

Linear low-density polyethylene LLDPE)

Linear low-density polyethylene resins

Linear low-density polyethylenes. See

Linear medium density polyethylene

Loop slurry process, high-density polyethylene

Low density linear polyethylene LDLPE)

Low density polyethylene processing

Low density polyethylene production

Low density polyethylene rheology

Low density polyethylene tubular

Low density polyethylene, LDPE composites

Low density polyethylenes (LDPEs

Low-Density Polyethylene (Branched PE, LDPE)

Low-Density Polyethylene High-Pressure Process

Low-density polyethylene

Low-density polyethylene , manufacture

Low-density polyethylene LDPE)

Low-density polyethylene LLDPE

Low-density polyethylene ethylene vinyl acetate copolymer

Low-density polyethylene membrane

Low-density polyethylene plastic

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Low-density polyethylenes. See

Low-density polyethylenes. See Polyethylene

Mechanical Properties of Low-Density Polyethylene

Mechanical properties medium-density polyethylene

Medium density polyethylene (MDPE

Medium density polyethylene, molecular

Medium-density polyethylene

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Molecular weight low-density polyethylene

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Multiwalled carbon nanotube-high-density polyethylene

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Pipes medium-density polyethylene

Poly Polyethylene, linear high-density

Polyethylene density classification

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Polyethylene nucleation density

Polyethylene, crystallites high-density

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Polyethylene, high-density relaxation transitions

Polyethylene, metallocene linear low-density

Polymer high-density polyethylene

Polymer low-density polyethylene

Polymerisation making linear low-density polyethylene

Polyolefin high-density polyethylene

Polyolefins polyethylene, high-density

Polypropylene density polyethylene

Preparation of high density polyethylene

Recycle high-density polyethylene

Recycled high density polyethylene

Regulations high-density polyethylene

Resins ultralow-density polyethylene

Self-reinforced high density polyethylene

Sheets of low-density polyethylene

Standard Test Method for Determination of Phenolic Antioxidants and Erucamide Slip Additives in Linear Low-Density Polyethylene Using Liquid Chromatography

Standard Test Method for Determination of Phenolic Antioxidants and Erucamide Slip Additives in Low-Density Polyethylene Using Liquid Chromatography

Stiffness high-density polyethylene

Syndiotactic polystyrene/high-density polyethylene

Thermoplastics low-density polyethylene

Ultra Low-Density Polyethylene (ULDPE) Resins

Ultra high density molecular weight polyethylene

Ultra low density polyethylene ULDPE)

Ultralow-density polyethylene ULDPE)

Ultralow-density polyethylenes

VLDPE density polyethylene

Very low density polyethylene

Very low density polyethylene VLDPE)

Virgin high-density polyethylene

Zeolite high-density polyethylene

Ziegler-Natta catalyst high-density polyethylene

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