Polyacrylonitrile tacticity

The preparation of macromolecular crystals from solution has been reported for a variety of polymers most of this work up to 1970 has been summarized by Wunderlich. The list given therein includes many (tactic) hydrocarbon polymers, polyacrylonitrile, polyacrylic acid, polyvinyl alcohol, linear polyethers, polyesters and polyamides, a trans-1,4-diene, and cellulose. 

In other cases, the changes with time are slower, as for polyacrylonitrile in dimethyl acetamide, cellulose trinitrate in isophorone, and poly(vinyl chloride) in di-2-ethylhexyl phthalate. In the latter, and in other polymers with structural irregularity due to lack of tactic order or copolymerization, the degree of crystallinity is presumably limited " and the increase in Gg with time eventually be-... 

Tacticity studies have been conducted on poly(3-methyl-l-butene) [120], poly(p-isopropyl-a-methyl styrene) [121], a-methyl styrene [122], polytetrafluoroethylene [123], polyacrylic acid [124], polymethylvinyl ethers [125], polyacrylonitrile [126, 127], polyvinyltrifluoro acetate [128], polyvinyl alcohol and its ethers [129, 130], isobutene-maleic anhydride [111], isobutene dimethyl fumerate [131], isobutene dimethyl maleate [131], polyacrylonitrile [127], ethylene - vinyl acetate [132-135], polyalkyl vinyl ethers [136, 137], ethyl-2-chloroacetate [133], poly-trans-1,3-pentadiene [138], isotactic-l-butene - propylene [139], butadiene - propylene [140], polybutene [141], polychloroprene [142], ethylene - vinyl chloride [143], chlorinated polyethylene [144, 145], poly-a-methyl styrene [146], styrene acrylic acid [147], a-methyl styrene - methacylonitrile [148], styrene acrylonitrile [149], styrene isobutene [150], poly(p-fluoro-a-methyl styrene) [151], polyarylamide-6 [152], PP - polyamide-6 [152], polystyrene oxide [153], polybutene [154], atraconic anhydride - p-chlorostyrene [155], styrene - maleic anhydride [156, 157], ethylene - vinyl acetate [158], polymethyl vinyl ether [159], propene - carbon monoxide [160], methyl(3,3,3-trifluoropropyl)siloxane [161], poly(diallyldimethyl ammonium chloride) [162], polypropene [163, 164], polyepichlorohydrin [165], maleic anhydride-p-chlorostyrene [166], polymethacrylonitrile [167] and polyvinyl acetate [168]. 

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