摘要
以聚丙二醇-1000、异佛尔酮二异氰酸酯、丙烯酸羟乙酯为原料,合成了聚氨酯丙烯酸酯(PUA)预聚物;将乙烯基三氯硅烷在丙酮中水解,制成八乙烯基低聚倍半硅氧烷(OVi-POSS);再将OVi-POSS作为交联剂加入PUA预聚物中,混合均匀后加入光引发剂2-羟基-2-甲基-1-苯基-1-丙酮,在紫外光固化箱中固化,制备出含POSS的PUA。通过红外、固体核磁(13C NMR和29Si NMR)、广角X射线衍射、高分辨透射电镜、热重和动态热机械等分析手段对含POSS的PUA进行了表征。结果表明:OVi-POSS纳米粒子均匀分布在PUA中;随着OVi-POSS用量的增加,PUA的耐热性和力学性能明显提高。与纯PUA相比,OVi-POSS用量为5份时的PUA在质量损失率为50%时的分解温度提高40℃,Tg提高12℃,拉伸强度提高127%;而OVi-POSS用量为3份时,PUA的冲击强度提高111%。
Polyurethane acrylate （PUA） prepolymers were prepared with polypropylene glycol （PPG）, isophorone diisocyanate and hydroxyethyl acrylate as the main raw materials. Then, the octavinyl-polyhedral oligomeric silsesquioxanes （ OVi - POSS） was synthesized by hydrolysis of trichlorovinylsilane in acetone. Pol- yurethane acrylate （PUA） containing OVi - POSS was prepared with OVi - POSS as a chain extender and was UV cured 2-hydroxy-2-methyl-phenyl n-propyl acetone used as photoinitiator. FTIR, solid-state NMR （13C NMR and 29Si NMR）, XRD, HRTEM, TGA and DMA characterized the structures of the products. Results showed that OVi -POSS dispersed uniformity in the PUA. As the OVi -POSS increased, the thermal resist- ance and mechanical properties of PU were significantly improved. When OVi - POSS was 5 phr, the mass loss of PUA was 50% with the temperature increased 40℃, Tg up to 12 ℃, and tensile strengthen improved 127%. While OVi -POSS was 3 phr, the impulse strengthen of PUA improved to 111%.
出处
《有机硅材料》
CAS
2013年第1期1-5,共5页
Silicone Material
基金
中物院双百人才基金资助项目(20088074)
关键词
聚丙二醇
异佛尔酮二异氰酸酯
丙烯酸羟乙酯
乙烯基三氯硅烷
聚氨酯丙烯酸酯
八乙
烯基倍半硅氧烷
polypropylene glycol, isophorone diisocyanate, hydroxyethyl acrylate, trichlorovinylsilane,polyurethane acrylate, octavinyl-polyhedral oligomeric silsesquioxane
