聚氨酯分子印章材料的制备及其性能研究  

Preparation and properties of polyurethane used for molecular stamps

作　　者：刘正春[1] 郭灿[1] 杨飞鹏[1] 王娟[1] 张欣[1] 

机构地区：[1]中南大学信息物理工程学院,湖南长沙410083

出　　处：《功能材料》2010年第5期763-766,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60801019)

摘　　要：以聚丙醚(PPG)和甲苯二异氰酸酯(TDI)为原料,20%的二月桂酸二丁基锡邻苯二甲酸二甲酯溶液为催化剂,3,3′-二氯-4,4′-二氨基二苯甲烷(MO-CA)和三羟甲基丙烷(TMP)作混合交联剂,通过浇注法得到用于极性分子印章制备的聚氨酯弹性体材料,其优化配方为:PPG,TDI和交联剂的摩尔比为1∶2.5∶0.90,交联剂中MOCA与TMP的摩尔比为5∶1。这种聚氨酯材料,在乙腈或乙醇中浸泡2h,溶胀体积变化在0.5%以下;其机械硬度、抗拉强度和50%的压缩复原率分别为72HA、3.57MPa和99.6%。Polyureathane elastomer for polar molecular stamps based on polypropylene glycol （PPG） and toluene diisocyanate （TDI） was obtained through pouring technique using 3,3＇-dichloride-4,4＇-methylenedianiline （MOCA） and trimethylolpropane （TMP） as co-crosslinker and a 20% dibutyltin dilaurate in dimethyl phthalate as catalyst. The optimized prescription was as follows：the molar ratio among PPG,TDI and crosslinker was 1：2.5：0.90,the molar ratio between MOCA and TMP was 5：1. The polyureathane elastomer showed a change in the volume of swelling of less than 0.5% after dipping in either acetonitrile or ethanol for 2h. Its mechanical hardness,tensile strength and 50% recovery rate of compression were measured to be 72HA,3.57MPa and 99.6%,respectively.

关 键 词：聚氨酯 溶剂效应 机械性能 形变 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]