聚乙烯基吡咯烷酮水溶胶的粘弹性表征

Viscoelastic Behavior Characterization of Poly(1-vinyl-2-pyrrolidmone) Hydrosol

本文采用60Co辐照乙烯基吡咯烷酮(NVP)水溶液和5wt%磷酸二氢钠(NaH2PO4)溶液引发NVP聚合交联的方法制备由超高分子量聚乙烯基吡咯烷酮(UPVP)和部分交联的PVP(CPVP)组成的水溶胶,测定水溶胶在注射前和经WN12针(直径1.18mm)注射后的粘弹性和粘度变化。实验结果表明,合理调节该水溶胶的组成,可使其注射前后都保持较好的粘弹性,且粘度变化较小。从而有望成为人眼玻璃体的替代物。

In this paper, a poly(1-vinyl-2-pyrrolidinone) hydrosol (PVP) containing super high molecular weight PVP (UPVP) and partly cross - linking poly(1-vinyl-2-pyrrolidinone) (CPVP) is synthesized by means of irradiation polymerization of 1-vinyl-2-pyrrolidinone. The polymerization process is carried out in water or in a 5 wt. % NaH2PO4 solution and 60Co is used as initiator. The viscoelastic behavior and viscosity of some select gels are characterized before and after injecting through a WN12 needle. Experimenta...