含有不同功能基团的丙烯酸长链酯共聚物在溶液中的相互作用研究(Ⅰ)

合成了分别具有质子给体和质子受体官能团的丙烯酸正辛酯共聚物。由于在给体和受体聚合物上分别引入的羧酸基团（AA）和碱性基团（VP），在溶液中进行共混复合时存在彼此间的相互作用而使共混体系表现出较高的比浓粘度。引入比浓粘度增长因子R，讨论了共混组分和溶剂体系等因素对聚合物分子链间相互作用的影响。结果表明，质子给体聚合物（PDP）和质子受体聚合物（PAP）的相互作用强度及等化学复合比与组分聚合物的分子链组成和溶剂性质有关。

Interaction Between Octyl Acrylate Copolymers Bearing Functional Groups in Solutions(Ⅰ)

An interpolymer complexation formed by polymer chains bearing complementary proton donor and acceptor was studied. In this study, poly(styrene\|co\|octyl acrylate\|co\|acrylic acid) as proton donating polymer(PDP) and poly(styrene\|co\|octyl acrylate\|co\|4\|vinylpyridine) as proton accepting polymer(PAP) with various macromolecular chain compositions were prepared by emulsion copolymerization. Complexed solutions formed by PDP and PAP were prepared, and reduced viscosity enhancement of the complexed solutions were studied with viscometry. The effects of the polymer solution concentration, copolymer compositions and solvent nature on the interpolymer interactions were investigated through a comparison of the reduced viscosity enhancement factor \%R\% of different complexed solutions. The results showed that the reduced viscosities of PDP/PAP complexed solutions were higher than weighted average of their constituents and \%R\% increased with increasing complexed polymer solution concentration generally. With the change in mole fraction of AA(\%x\%\-\{AA\}) in blends, there existed a \%R\%\-\{max\} indicating the strongest interaction between PDP and PAP. In toluene as an inertia solvent not impacting on acid\|base interaction, due to steric shield effect of side chains in octyl acrylate unit and self association of carboxyl in PDP altogether, mole fraction of AA corresponding to \%R\%\-\{max\}, \%x\%\-\{AA,max\}, increased gradually up to 0\^5 as OA content decreased in PDP and relatively insensitive to composition of PAP. Whereas in THF as solvent, \%x\%\-\{AA,max\} was generally independent of composition of PDP and approximated to 0\^5 due to THF being capable of destroying interpolymer interaction as well as self\|association of carboxyl. In addition, the strength of interpolymer interaction between PDP and PAP was increased with increasing OA content in component copolymers.