文献类型：期刊文献

中文题名：聚酯相对分子质量对嵌段聚氨酯弹性体形态与性能的影响

英文题名：EFFECTS 0F MOLECULAR WEIGHT OF POLYESTER ON MORPH0LOGY AND PROPERTIES OF POLYURETHANE

作者：杲云[1];张志平[1];应圣康[1];高永琪[1];袁忠麒[1];叶菁宣[1]

机构：[1]华东理工大学材料科学研究所,化学工业部黎明化工研究院

年份：1996

卷号：19

期号：4

起止页码：225

中文期刊名：合成橡胶工业

外文期刊名：China Synthetic Rubber Industry

收录：CSTPCD;;北大核心:【北大核心1992】；CSCD:【CSCD_E2011_2012】；

语种：中文

中文关键词：分子质量;橡胶;嵌段共聚;聚氨酯弹性体;聚酯

外文关键词：poly(1,4-butanediol hexandioic acid)ester; polyurethane; molecular weight ;microphase separation; crystallinity; mechanical property

摘要：以聚１，４－丁二醇己二酸酯（ＰＢＡ）为软段，４，４＇－二苯基甲基二异氰酸酯和扩链剂丁二醇（或不加）为硬段，经一步法合成了不同软段相对分子质量的ＰＢＡ型聚氨酯（ＰＵ）。借助ＤＳＣ法、Ｘ射线、ＴＥＭ法等对试样性能进行了分析。当ＰＢＡ相对分子质量从５００增加到２０００时，软段玻璃化转变温度则由－２２．９℃减小到－３９．７℃，微观相分离程度由０．１３增加到０．２７，ＰＢＡ型ＰＵ由无链段结晶变成含有许多软、硬段结晶，从而使拉伸强度和伸长率分别由１．４３ＭＰａ，３２４％提高到３．１６ＭＰａ，８１９％。
A series of segmented polyester based polyurethane elastomers in the range of molecular weight of polyester between 500 and 2 000, were prepared using poly(1,4-butanediol hexandioic acid ) ester (PBA)and 4,4'-diphenylmethane diisocyanate extended with 1,4-butanediol. The influence of molecular weight of soft segment on structure,morphology and properties of polyurethane was studied by DSC,X-ray, TEM and tensile testing. When the molecular weight of PBA increased from 500 to 2 000, the glass-transition temperature of soft segment decreasedfrom-22.9℃to-39.7℃,microphase separation degree increased from0.13 to 0.27,the polyurethane varied from no evidence of crystallinity to more crystallinity of soft and hard segment,and the tensile strength and elongation increased from 1. 43 MPa, 324% to 3. 16 MP a,819% respectively.