大豆油基聚氨酯耐热性能的研究  

Study on heat-resistance of soybean oil-based polyurethane

作　　者：刘振民[1,2] 亢茂青[2] 王军威[2] 赵雨花[2] 殷宁[2] 王心葵[2] 

机构地区：[1]中国科学院大学,北京100049 [2]中国科学院山西煤炭化学研究所,太原030001

出　　处：《化工新型材料》2013年第11期142-144,共3页New Chemical Materials

摘　　要：以环氧大豆油和MDI为原料,在催化剂作用下合成含口恶唑烷酮和异氰尿酸酯环的聚氨酯预聚体,与扩链剂作用制备聚氨酯材料并做对比试验。TG分析表明:与传统聚氨酯材料相比,引入口恶唑烷酮环的大豆油基聚氨酯的耐热性能有了较大的提高:热分解起始温度由251℃提高到288℃、热分解终止温度由492℃提高到510℃。选择不同种类催化剂用于聚合反应,结果表明A1C13·HMPA是较适宜的合成大豆油基耐热性预聚体的催化剂。进一步考查了投料顺序、反应温度和I/E值对聚氨酯耐热性影响,结果表明:在n(NCO)∶n(环氧基团)=6∶1,催化剂用量为2%的条件下,于180℃反应2h,制备聚氨酯材料的耐热性能较好。Epoxidized soybean oil and 4,4＇-diphenylmethane diisocyanate were adopted as raw materials for synthe- sis of NCO-terrninated polyurethane prepolymer including oxazolidone-ring and isocyanurate-ring in the molecular main lines which reacted with chain extender to prepare polyurethane material. Contrast experiment was made at the same condi tions. TG analysis proved that soybean oil-based polyurethane with oxazoliodne-ring introduced in molecule line had higher heat-resistance than traditional polyurethane materials. Kinds of catalysts were screened for polymerization and the analysis results proved that AICl3 . HMPA was the fittest catalyst for synthesis of the polyurethane. Furthermore, effects of the feeding sequence, reaction temperature and I/E value on heat resistance of the polyurethane were investigated. The results indicated that,with the molar ratio of isocyanate group to epoxy group 6 ： 1, 2% of catalyst amount based on the total weight of isocyanate and epoxidized soybean oil, reacted at 180℃ for 2h, heat resistance of the polyurethane was higher than others.

关 键 词：环氧大豆油 聚氨酯 耐热性能 噁唑烷酮 异氰脲酸酯 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]