Copolymer composition, diagram

Fig. 3. Copolymer composition diagrams calculated by penultiii e nmdel and ROMM.

Figure 3. Copolymer composition diagram of CPT-SOj-AN expressed as a binary copolymer...

From the Finemann-Ross plot of the data in Table II, monomer reactivity ratios are determined. riK = 0.654, r2/K = 1.09. The copolymer composition diagram is shown in Figure 3, which includes both spontaneous and catalytic polymerization to prove the similarity of both mechanisms. 

Figure 6. Copolymer composition diagram for AAM-DMAEM. Key —, 60 °C with ACV , 60 °C with KPS ---,45 with ACV.

In a certain copolymer system, the reactivity ratios are = 0.001 and rj = 0.002. Sketch the copolymer composition diagram expected for this pair of monomers. 

In a first part of this paper, we will discuss results of a 27A1 NMR study of the binding of Al ions on acrylamide-acrylic acid copolymers as a function of pH, at the light of a simple electrostatic model. The second part deals with the phase diagrams, physical gelation and precipitation phenomenon, for different copolymer compositions and under various conditions of concentrations, pH and salinity. 

Fig. 9. Phase diagram showing the temperature versus the copolymer composition. The dashed areas correspond to the transition region. The frontiers among the different regions depend on sample preparation as well as on sample thermal and processing history. The fraction of ferroelectric phase, Ff, increases with increasing PVF2 content...

Fig. 6.12 Phase diagram for blends of various PS homopolymers with nearly symmetric PS PI and PS PB diblocks, with approximately constant copolymer composition (/PS -0.44-0.55) (Winey et al. 19926). Symbols and annealing conditions as for Fig. 6.10.

Equation (70) itself is, of course, no more illustrative than eqn. (66) but its graphical representation provides a clearer picture of the dependence of copolymer composition on the momentary relative contents of the two monomers in the mixture. The copolymerization diagram, as the F, = fft) dependence is called, also clearly illustrates the role of the copolymerization parameters in copropagation (see Fig. 17). 

Fig. 23. Space diagram of the copolymerization surface. Copolymer composition as a function of the monomer mixture composition and conversion (S-AN).

SAN copolymer compositions in solution will phase separate when they differ in composition by around 4mol% [85]. The thermodynamics of this system has been described in detail, in terms of interaction parameters [86,87], and calculated phase diagrams agree with published experimental data. 

The phase diagram of polyolefins and hydrocarbon diluents is exemplified for high-density polyethylene in Figure 1. When the polymer-diluent mixture is heated, dissolution of the semicrystalline polymer takes place along the borderline 1 (turbidity curve) [43, 44], This line depends on the polymer (e. g., polyethylene, isotactic polypropylene), average chain length, and copolymer composition. 

An isothermal morphology diagram of poly(styrene-fe/oc -butadiene) is shown in Fig. 19 as a function of molecular weight and copolymer composition the classic morphologies include spherical microdomains (0< a<0.15) packed in a body-centered cubic lattice, hexagonally packed cylindrical microdomains (0.15 <( a-0-3), and alternating lamellae of approximately symmetric diblocks (0.3 <0 -0-5). Sever-... 

If the copolymer is based on monomers whose homopolymers exhibit identical me-sophases, its phase diagram follows ideal solution behavior with a continuous, linear or slightly curved dependence of the transition temperature and enthalpy of at least the highest temperature mesophase on copolymer composition [132, 134,136-140,364]. For example. Fig. 24 a demonstrates that the two structural units ofpoly 3-[(4 -(4"-cya-nophenyl)phenoxy)propyl]vinyl ether -co- 5-[(4 -(4"-cyanophenyl)phenoxy)pentyl] vinyl ether are isomorphic within the nematic mesophase, although they are not iso-... 

Blanazs A, Ryan AJ, Armes SP (2012) Predictive phase diagrams for RAFT aqueous dispersion polymerization effect of block copolymer composition, molecular weight, and copolymer concentration. Macromolecules 45 5099-5107... 

Fiber diagrams for three copolymer compositions are shown in fig. 1, and meridional 0/29 diffractometer scans for all five are shown in fig. 2. The data indicate that there is a high degree of axial orientation of the molecules in the fibers. The fiber diagrams show intense equatorial scatter at d-5.0-2.5A which contains some very sharp maxima equatorials at d=4.6 and 2.6A and an off-equatorial at d=3.3A. These data indicate that there is some three-dimensional order, but the diffuse equatorial scatter shows that much of the lateral packing is irregular. The question of the chain packing can only be addressed when we have a model for the chains themselves, which will be derived from the meridional data (fig. 2). 

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