紫外光固化含POSS聚氨酯丙烯酸酯的合成、表征与热力学性能研究  

Synthesis,Characterization and Thermodynamic Properties of UV Polyurethane Acrylate Containing POSS

作　　者：李镇江[1,2] 梁玮[1,2] 张林[2] 

机构地区：[1]西南科技大学,四川绵阳621010 [2]中国工程物理研究院,四川绵阳621900

出　　处：《有机硅材料》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)

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%.

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 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]