%0 Journal Article
%T The glass transition temperature and microstructure of polyurethane/epoxy resin interpenetrating polymer networks nanocomposites
%A JIA Qingming
%A <br>JIA
%A Qingming
%A ZHENG
%A Maosheng
%A SHEN
%A Renjie
%A CHEN
%A Hongxiang
%J 科学通报(英文版)
%D 2006
%I 
%X Nanocomposites with various contents of organophilic montmorillonite (oMMT) have been prepared by adding oMMT to interpenetrating poly- mer networks (IPNs) of polyurethane and epoxy resin (PU/EP) which had been prepared by a sequential polymeric technique. DSC experiment indicates a novel phenomenon that the glass transition tem- perature (Tg) of the nanocomposites increases with the oMMT content up to 3 %, then decreases with further increasing oMMT content. In order to explain this phenomenon, crosslink density, hydrogen bond- ing in the hard segments, crystallization of the nanocomposites and the exfoliation degree of oMMT in the nanocomposites have been investigated by swelling method, FT-IR, XRD, SEM and TEM, re- spectively. The results indicate that the crosslink density and the hydrogen bonding index of the nanocomposites increase, but the crystallization de- gree of the nanocomposites decreases with increas- ing oMMT content. In addition, oMMT improves the network structure of PU/EP.
%K organophilic montmorillonite
%K interpenetrating polymer networks
%K nanocomposites
%K glass transition temperature<br>聚亚安酯
%K 环氧树脂
%K 有机蒙脱石
%K 纳米复合物
%K 玻璃态转化温度
%K 微观结构
%K 互穿聚合物网络
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=DD6615BC9D2CFCE0B6F945E8D5314523&aid=7162BD1A18DE6DB928FDE9EC0E1890E6&yid=37904DC365DD7266&vid=987EDA49D8A7A635&iid=38B194292C032A66&sid=2AC7DCCBBC26ECF8&eid=88D36036CFF69B3C&journal_id=1001-6538&journal_name=科学通报(英文版)&referenced_num=2&reference_num=23