乙醇在聚氨酯/乙烯基酯树脂互穿网络中的吸收动力学及传递分析

采用石英弹簧称重法测定了乙醇在几种聚氨酯（PU）／乙烯基酯树脂互穿网络（IPN）中的吸收动力学数据，用蠕变传递模型对实验数据进行关联，并对IPN的微观结构进行了分析。结果表明：乙醇在PU／含促羟基的乙烯基酯树脂（CBIPN）膜和PU／正丁醇接枝乙烯基酯树脂（HBIPN）膜中的D远大于在PU膜和PU／不含仲羟基的乙烯基酯树脂（PIPN）膜中的D，关联得到的CBIPN和HBIPN膜的杨氏模糊也远大于纯PU和PIPN膜，与其它实验结果相吻合，说明在网络间引入化学键或氢键作用能有效地改善聚氨酯／乙烯基酯树脂互穿网络的相容性，从而提高材料的力学性能     

Strain Rate and Temperature Effects on Tensile Properties and Their Representation in Deformation Modeling of Vinyl Ester Polymer

This paper discusses the effects of strain rate and temperature on tensile properties and stress-strain behavior of vinyl ester polymer. Tensile strength and modulus were found to increase linearly with the log of strain rate, and decrease linearly with increasing temperature. Ramberg-Osgood and Menges models were used and extended to describe the strain rate and temperature dependency of the stress-strain behavior. The extended Menges model provided better representation of the observed behavior compared to the Ramberg-Osgood model for a wide range of temperatures and strain rates. Mechanical properties obtained from flexure tests are also presented and compared to tensile data.     

新型非硅双氧水稳定剂膦酸酯低聚物的合成和性能测试

由乙酸和三氯化磷合成一种新型的双氧水稳定剂──膦酸酯低聚物，对其性能进行了测试。实验表明，该稳定剂在重金属存在下和在强碱介质中能有效地抑制双氧水的分解，其稳定性能优于稳定剂ＧＪ－１０１和Ｎａ＿２ＳｉＯ＿３。