PPC/PBS共混体系的粘弹特性  

Viscoelastic Properties of Poly(Propylene Carbonate)/Poly(Butylene Succinate)Blends

作　　者：陈君[1] 蒋霞[1] 陈庆华[2,3] 钱庆荣[2,3] 黄宝铨[2,3] 刘欣萍[2,3] 许兢[2,3] 肖荔人[1] 

机构地区：[1]福建师范大学材料科学与工程学院 [2]福建师范大学环境科学与工程学院 [3]福建师范大学福建省污染控制与资源循环重点实验室,福建福州350007

出　　处：《高分子材料科学与工程》2013年第12期43-47,共5页Polymer Materials Science & Engineering

基　　金：福建省自然科学基金资助项目(2011J01287;2012J01195)

摘　　要：用熔融共混法制备了聚碳酸亚丙酯（PPC）／聚丁二酸丁二醇酯（PBS）共混材料，并采用流变学方法对所制备的共混体系的粘弹特性进行了深入研究。结果表明，PPC／PBS为典型的热力学不相容体系，PBS的加入提高了PPC的加工性能；当PBS的质量分数约为40％～50％时，体系发生相反转，这与Paul模型对相反转点预测的结果一致；在相分离区，动态模量偏离了经典的低频末端标度规则，Han图表现出不同于均相体系的特征，引起时温叠加原理失效；与Gramspacher．Meissner模型相比，Palierne模型可以较好地描述PPC／PBS体系的线性粘弹行为。Poly （propylene carbonate）/poly （butylene succinate） （PPC/PBS） blends were prepared by melt mixing. The viscoelastic properties of the resultant blends were investigated by the theological method. The results indicate that PPC/PBS blends are a typical thermodynamically immiscible system. The presence of PBS improves the processing performance of PPC. The phase inversion of the blends occurs in the PBS mass fraction range of 40 % 50 % , which is consistent with the result predicted by Paul model. In the phase-separated region, dynamic modulus deviate from the classic low frequency scale rules, and Han plots show characteristics unlike the homogeneous system, which causes the failure of time-temperature superposition principle. Compared with Gramspacher-Meissner model, Palierne model can better describe the viscoelastic behaviors of PPC/PBS blends.

关 键 词：聚碳酸亚丙酯 聚丁二酸丁二醇酯 相反转 粘弹特性 

分 类 号：O631.21[理学—高分子化学]