用粘度法研究共混聚合物的相溶性

Study on Polyblends Miscibility by Viscometry

摘要: 用乌氏粘度计测定含氢键共混体系PS(OH)/PBMA,PS(OH)/PBA和不含氢键的PBMA/PBA在甲苯中25℃的比浓粘度,根据η_(SP)/C～C的线性关系可计算出Huggins参数K_(H)和Chee提出的半经验参数μ。实验结果表明在这三组共混体系中PS(OH)/PBMA的氢键结合能力比PS(OH)/PBA强,而PBMA/PBA不存在键段之间的特殊相互作用,体系是不相溶的。

Abstract: The miscibility of polyblends PS(OH) / PBMA, PS(OH) / PBA, PBMA / PBA can be determined by viscometry. The method is derived from the classical Huggins equation and rests on validity of an additive law pertaining to intrinsic viscosity. It is found that P