摘要
以无定形二氧化硅为起始原料,与乙二醇、氢氧化钾反应,生成高反应活性的五配位硅钾化合物,以此为原料与含活泼氯的2-氯乙醇反应,制备出双羟基四配位硅单体。然后用该单体与马来酸酐(MA)、1-2丙二醇反应制备出线性不饱和聚酯的预聚体,再与苯乙烯进行自由基聚合得到共聚物,并对所合成的共聚物进行了红外光谱、热重分析等结构表征与性能分析。红外光谱表明,3 377 cm-1是端O—H的振动吸收峰,3 128 cm-1是C—H的伸缩振动吸收峰,1 728 cm-1是C=O的振动吸收峰,1 067cm-1是Si—O—C的振动吸收峰,866 cm-1是Si—O—C的面外弯曲振动吸收峰。热重分析表明,由于硅的引入,配位硅改性树脂耐热性比未改性树脂提高了近20℃左右;配位硅改性树脂的洛氏硬度比未改性树脂提高了1.5倍;改性后树脂的吸水率比未改性树脂低50%左右。
A highly reactive penta-coordinated organic silicon complex was prepared by means of the reaction of silica with ethylene glycol and potassium hydroxide. Then the di-hydroxy tetracoordinated silicon by the reaction of C1CH/CHzOH with penta-eoordinated silicon complex was synthesized. Besides, the prepolymer of linear unsaturated polyester was prepared with the reaction of maleicanhydride and di-hydroxy tetracoordinated silicon, and the copolymer with styrene was synthesized by the free radical polymerization. The structure and properties of polymer were characterized by the FTIR, and TG, etc. The IR indicated （KBr, cm-l） ： v-OH, 3 377; vC-H, 3 128;vC = O , 1 728 ; vSi-O-C, 1 067 and 866. TG analysis showed that the thermal stability of the modified unsaturated polyester was increased 20 ℃ higher than that of the no-modified unsaturated polyester, because of the introduction of silicon; the HK hardness of the modified unsaturated polyester was increased 1.5 times compared to that of the no-modified unsaturated polyester; the water resistance was decreased one times lower than that of the no-modified unsaturated polyester.
出处
《实验室研究与探索》
CAS
北大核心
2012年第7期42-44,63,共4页
Research and Exploration In Laboratory
关键词
配位硅
双羟基四配位硅
改性
不饱和聚酯树脂
coordinated silicon
di-hydroxy tetracoordinated silicon
modified
unsaturated polyester
