甲苯二异氰酸酯形成的聚氨酯脲与接枝乙烯基酯树脂互穿网络研究  

STUDY ON INTERPENETRATING NETWORKS COMPOSED OF POLYURETHANE-UREA FORMED WITH TOLUENE DIISOCYANATE AND GRAFT VINYL ESTER RESIN

作　　者：王贵友[1] 胡春圃[1] 

机构地区：[1]华东理工大学材料科学与工程研究所,上海200237

出　　处：《高分子学报》2001年第1期52-57,共6页Acta Polymerica Sinica

基　　金：国家自然科学基金!资助项目 (基金号 5 96 730 19)

摘　　要：本文首先通过分子设计技术合成了一系列侧链长度可以控制的接枝乙烯基酯树脂 (接枝VER :BO g VER ,2 0 0 g VER ,390 g VER) ,并用它们与甲苯二异氰酸酯合成的聚氨酯脲 (PUU)形成同步互穿网络(SIN) .通过DSC、SEM等考察了接枝VER的结构对PUU/接枝VERSIN的形态与力学性能的影响 .在PUU/BO g VERSIN中 ,BO g VER网络主要与PUU网络中的硬段相容和互穿 ;对于PUU/ 2 0 0 g VERSIN而言 ,2 0 0 g VER网络与PUU网络中的软段和硬段均有一定的相容性 .由于这两种SIN中两个网络间均有一定的相容性和互穿 ,故这类接枝网络能显著地增强PUU网络 ,使材料的力学性能有较大幅度的提高 .390 g VER网络本身存在的微相分离结构 ,使PUU/ 390 g VERSIN两个网络也存在显著的相分离形态 ,导致390 g VER网络对PUU网络的增强效果并不明显 .A series of well defined graft vinyl ester resins (graft VER),i.e.butanol (BO),poly(oxy\|propylene) with different molecular weights (200 or 390),which were simply called as BO g VER, 200 g VER and 390 g VER respectively, consisting of different kinds and lengths of the side chains were synthesized and characterized.The simultaneous interpenetrating networks(SINs) of graft VER and polyurethane urea (PUU) formed with toluene diisocyanate have been prepared.The effect of graft VER structure on the morphology and mechanical properties of PUU/graft VER SIN was studied through DSC and SEM observation etc. For PUU/BO g VER SIN, the BO g VER network is mainly interpenetrated and miscible with the hard segments of PUU network. For PUU/200 g VER SIN, there have some interpenetration and miscibility between the 200 g VER network and the hard segments as well as soft segments existing in the PUU network.Thus,the strong reinforcement effect of these two graft networks on the PUU network was observed, and the mechanical properties of SINs were enhanced appreciably. There exhibited obvious phase separated morphology between the two networks in PUU/390 g VER SIN, because of existing microphase separated morphology of 390 g VER network in itself. In this case, the enhancement effect of such a graft VER network on the PUU network is limited.

关 键 词：聚氨酯脲 接枝乙烯基酸树脂 同步互穿网络 形态结构 力学性能 

分 类 号：O632[理学—高分子化学]