摘要
利用乙二胺(EDA)对碳酸丙烯酯(PC)的胺解开环反应制备非异氰酸酯聚氨酯(NIPU)单体,通过NIPU的端位羟基(—OH)与丙烯酰氯(AC)发生酯化反应,合成同时具有氨基甲酸酯键(—NHCOO—)和碳碳双键(C■C)的非异氰酸酯聚氨酯丙烯酸酯(NIPUA)单体。将合成的NIPUA单体与丙烯酸丁酯(BA)、丙烯酸(AA)等丙烯酸类化合物在过氧化苯甲酰(BPO)和N,N-二甲基苯胺(DMP)作用下发生加聚反应,制备出一种新型非异氰酸酯聚氨酯丙烯酸酯胶黏剂,并继续固化。利用红外光谱对合成产物的结构进行表征,结果表明,该胶黏剂在一定的条件下能发生C■C双键的加聚固化反应。通过研究单因素对胶黏剂固化性能的影响,获得胶黏剂固化的最佳工艺。
Non-isocyanate polyurethane(NIPU)monomer is firstly prepared through ring-opening reaction between propylene carbonate(PC)and ethylene diamine(EDA).Then NIPUA monomer with urethane bond(—NHCOO—)and C■C double bond both is synthesized by esterification between acryloyl chloride(AC)and end-hydroxyl of NIPU.The structure of products is confirmed by FT-IR and the synthesis process parameters are optimized by single-factor experiments.Addition polymerization is performed between the synthesized NIPUA monomer and butyl acrylate(BA),acrylic acid(AA)in the presence of benzoyl peroxide(BPO)and N,N-dimethylaniline(DMP),and a new urethane acrylate adhesive is prepared.IR spectra shows that this adhesive can be cured under certain conditions.The synthesis and cure process are optimized by single-factor experiments and the optimal conditions are found.
引文
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