水性聚氨酯合成中的中和方式对PU/PVC复合树脂性能的影响  

Influence of Using Neutralizers in the Preparation of Waterborne Polyurethane on Properties of the PU/PVC Composite Resins

作　　者：刘栋杰[1] 潘明旺[1] 袁金凤[1] 刘仕沛[1] 

机构地区：[1]河北工业大学高分子科学与工程研究所,天津300130

出　　处：《塑料工业》2009年第2期36-38,46,共4页China Plastics Industry

基　　金：河北省自然科学基金资助项目(B2006000014);河北省教育厅资助项目(项目号2004420)

摘　　要：采用预聚体分散法,以甲苯2,4-二异氰酸酯(TDI)、聚醚(PPG-3000)和二羟甲基丙酸(DMPA)为主要原料,分别采用氢氧化钠(NaOH)和三乙胺(TEA)为中和剂合成了阴离子水性聚氨酯(PU)。同时,以PU为种子原位共聚氯乙烯,制备了PU/PVC复合树脂。通过电子万能试验机、冲击试验机、动态力学分析仪(DMA)、扫描电子显微镜(SEM)和TA-2000热分析仪等手段对PU乳液和PU/PVC树脂进行了测试和表征。结果表明:采用TEA为中和剂的乳液其PU的玻璃化转变温度较低,接枝后的复合树脂冲击强度明显提高;不同的中和方式对材料的热稳定性影响较小,采用NaOH中和时热稳定性较好。Anionic water-borne polyurethane （PU） emulsion was prepared with toluene diisocyanate （ TDI）, polypropylene glycol 3000 （PPG-3000） and dimethylol propionic acid （DMPA） by prepolymer dispersing process. Sodium hydroxide and triethylamine were used as neutralizers respectively. PU/PVC composite resins were prepared by in-situ copolymerization of the PU latex and vinyl chloride monomer. The latex PU and PU/polyvinyl chloride （PVC） composite resins were characterized and determined via electronic universal testing machine, impact testing machine, dynamic mechanical analyzer, scanning electron microscopy （SEM） and TA-2000-type thermal analyzer respectively. The results showed that. while using triethylamine glass transition temperature （Tg） of the PU was lower, and the impact strength of the PU/PVC composite resin was improved significantly, however, the thermal decomposition temperature was higher while using sodium hydroxide as a neutralizer. The influence of the neutralizers was not obvious on heat stability of composite resin materials.

关 键 词：水性聚氨酯 聚氨酯/聚氯乙烯复合树脂 中和剂 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]