硬段结构对交联聚醚聚氨酯弹性体降解的影响

IF 1.4 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Elastomers and Plastics Pub Date : 2010-02-03 DOI:10.1177/0095244310362732

S. Oprea

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引用次数: 9

摘要

以聚(1,4-丁烷二醇)、4,4 ' -二苯基甲烷二异氰酸酯、1,6六亚甲基二异氰酸酯为原料，在37℃蒸馏水中水解降解了不同含量和性质的硬段和固定软段长度的交联聚氨酯(pu)。聚合物样品的孵育时间最长为30天。经过一定时间的孵育后，测试了PU样品的拉伸强度和形态的变化。通过FTIR-ATR和力学性能分析来确定降解程度。结果表明，在蒸馏水中，pu的降解程度取决于交联程度和二异氰酸酯和扩链剂的性质。

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Influence of Hard Segment Structure on Degradation of Cross-linked Poly(ether urethanes) Elastomers

Cross-linked polyurethanes (PUs) based on poly(1,4-butane diol), 4,4′-diphenylmethane diisocyanate, 1,6 hexamethylene diisocyanate with a varied content and nature of the hard segment and a constant soft segment length were hydrolytically degraded in distilled water at 37°C. The incubation of polymer samples took place over a period of maximum 30 days. The changes in tensile strength and morphology of PU samples were tested after a particular period of incubation. Degradation was determined by FTIR-ATR and by analyzing mechanical properties. It is demonstrated that the degree of degradation of PUs in distilled water is dependent on the degree of cross-linking and nature of the diisocyanates and chain extenders.

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来源期刊

Journal of Elastomers and Plastics 工程技术-材料科学：综合

CiteScore

3.30

自引率

5.90%

发文量

审稿时长

6 months

期刊介绍： The Journal of Elastomers and Plastics is a high quality peer-reviewed journal which publishes original research on the development and marketing of elastomers and plastics and the area in between where the characteristics of both extremes are apparent. The journal covers: advances in chemistry, processing, properties and applications; new information on thermoplastic elastomers, reinforced elastomers, natural rubbers, blends and alloys, and fillers and additives.