丙烯酸酯偶联剂在丙烯酸酯改性聚氨酯杂化材料中的反应活性  

Reactivity of Coupling Agents in Acrylate-Modified Polyurethane Hybrid Materials

作　　者：张志国[1] 姜绪宝[1] 朱晓丽[1] 孔祥正[1] 

机构地区：[1]济南大学化学化工学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2010年第4期359-363,共5页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(20874040);济南大学科研基金(XKY0721)

摘　　要：合成烯丙基甘油醚(AG)作为一种新型双羟基偶联剂用于聚氨酯(PU)与丙烯酸酯聚合物(PAC)的改性材料。采用核磁共振、红外光谱和气相色谱等对其进行表征。研究偶联剂AG和HEA与PU预聚体和丙烯酸酯单体的反应性。实验结果表明:随着偶联剂(AG和HEA)与PU反应温度的升高,异氰酸酯(NCO)的转化率逐渐增加;使用AG为偶联剂时,PU和AC未发生接枝反应;使用HEA为偶联剂时,明显发生了预期的接枝反应。当n(HEA)∶n(NCO)<1时,随HEA用量增加,PU与AC的接枝率逐渐增加;当n(HEA)∶n(NCO)>1时,继续增加HEA用量PU接枝率变化不大。Acrylate（HEA） and AG as coupling agent,PU-AC hybrid latexes were prepared.The reactivity of HEA and AG towards isocyanates（NCO） and AC monomers was studied.Experimental results show that with increasing the temperature of the reaction between the coupling agents and terminal NCO on PU prepolymers,NCO conversion increases,and that when the amount of added HEA is less than that of NCO on PU prepolymers,PU grafting increases with the increase of HEA;while when the amount of added HEA is more than that of NCO,PU grafting changes little.When AG is used as coupling agent,PU grafting is not detected because of its stable allyl radical group and self-inhibition.

关 键 词：聚氨酯改性 偶联剂 丙烯酸羟乙酯 烯丙基甘油醚 聚氨酯接枝率 

分 类 号：O631.5[理学—高分子化学]