Flory-Huggins interaction listed

Blends of AMS-AN copolymers with PVC are used to increase the heat resistance of the product. Blends of PVC and AMS-AN copolymers were formed by precipitation with THF solution into methanol. Miscible blends were found for copolymers of AMS-AN with AN composition containing 11.9-30.0 wt%. Phase separation temperatures were noted by annealing and DSC methods. Phase separation temperatures below 130°C were found. Using the characteristic EOS parameters listed in Table 3.4 and the phase separation temperatures that were measured, the AP values were calculated for the blend system. These values were found to be AP nvc = 4.30 cal/cc APamsvc = 0-26 cal/cc and APan,ams = 8.6 cal/cc. The Flory-Huggins interaction parameters at 130°C were calculated and B Nyc = 4.22 cal/cc B msvc = 0-37 cal/cc Bams,an = 8.04 cal/cc. The binary interaction parameter of the copolymer-homopolymer blend for AMS-AN copolymer and PVC homopolymer for various AN compositions in the copolymer at various volume fractions in the blend is shown in Figure 3.7. 

Table 5.2 List of all Flory-Huggins interaction parameters. The segment types are defined in Table 5.1. The table is symmetric, that is, Xab = Xba and has zero values on the diagonal = All parameters are taken from Ref [5].

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