【作者】 肖红勤； 殷先德； 马佼佼； 包建军；

【Author】 XIAO Hongqin;BAO Jianjun;State Key Laboratory of Polymer Materials Engineering,Sichuan University;

【机构】 四川大学高分子材料工程国家重点实验室；

【摘要】 <正>聚乙烯醇是（PVA）一种广泛应用于人们生活中的水溶性聚合物,它可以用作维尼纶,浆料,涂料,粘合剂,乳化剂,包装材料,药物缓释材料等^[1]。疏水改性聚乙烯醇是侧链上带有少量疏水单元的聚乙烯醇。而疏水长链改性聚合物跟线型聚合物相比,随疏水长链的增多,逐渐形成网络结构^[2],通常具有较好的粘度稳定性,具有特殊用途。本文制备了一种含疏水长链和阳离子单元的单体,该单体与醋酸乙烯酯（VAc）在偶氮二异丁腈（AIBN）的引发下发生溶液共聚后,再将聚合物醇解,制备了疏水改性阳离子聚乙烯更多还原

【Abstract】 In this paper,a novel hydrophobic monomer with hydrophobic units and double bond linked by urethane bond was prepared.Then modified poly(vinyl acetate)(PVAc) was prepared by a radical solution copolymerization of vinyl acetate(VAc) and the hydrophobic monomer with methanol and azobisisobutyronitrile(AIBN) as solvent and initiator,respectively.Then,hydrophobic poly(vinyl alcohol)(PVA) were prepared by alcoholysis of obtained PVAc in alkaline conditions.The structure of the hydrophobic monomer prepared and the effect of hydrpphobe content on the shear viscosity of modified PVA were studied.The results show that physic network was established by inter molecular association and the network was stronger with increasing hydrophobe contents.更多还原