高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (12): 2108.

• 研究论文 • 上一篇    下一篇

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)

汪瑜华, 戚国荣, 李慧玲, 彭红云, 杨士林   

  1. 浙江大学高分子科学和工程系高分子科学研究所, 杭州 310027
  • 收稿日期:2000-12-13 出版日期:2001-12-24 发布日期:2001-12-24
  • 通讯作者: 戚国荣(1938年出生),男,教授,博士生导师,主要从事功能及精细高分子研究.E-mail:qiguor@263.net E-mail:qiguor@263.net
  • 基金资助:

    国家自然科学基金(批准号:59973016)资助

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

WANG YuHua, QI GuoRong, LI HuiLing, PENG HongYun, YANG ShiLin   

  1. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2000-12-13 Online:2001-12-24 Published:2001-12-24

摘要: 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.

关键词: 特殊相互作用, 质子给体, 质子受体, 复合

Abstract: An interpolymer complexation formed by polymer chains bearing complementary proton donor and acceptor was studied. In this study, poly(styrenecooctyl acrylatecoacrylic acid) as proton donating polymer(PDP) and poly(styrenecooctyl acrylateco4vinylpyridine) as proton accepting polymer(PAP) with various macromolecular chain compositions were prepared by emulsion copolymerization. Complexed solutions formed by PDPand PAPwere 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/PAPcomplexed 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(xAA) in blends, there existed a Rmax indicating the strongest interaction between PDPand PAP. In toluene as an inertia solvent not impacting on acidbase interaction, due to steric shield effect of side chains in octyl acrylate unit and self association of carboxyl in PDPaltogether, mole fraction of AAcorresponding to Rmax, xAA,max, increased gradually up to 0.5 as OAcontent decreased in PDPand relatively insensitive to composition of PAP. Whereas in THFas solvent, xAA,max was generally independent of composition of PDPand approximated to 0.5 due to THFbeing capable of destroying interpolymer interaction as well as selfassociation of carboxyl. In addition, the strength of interpolymer interaction between PDPand PAPwas increased with increasing OAcontent in component copolymers.

Key words: Specific interaction, Proton donor, Proton acceptor, Complexation

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