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用溶液共混的方法,制备了不同质量分数的笼形氨丙基聚倍半硅氧烷(OAPS)与聚乳酸(PLLA)杂化材料。用傅立叶红外光谱(FTIR)、差示扫描量热法(DSC)、动态热机械分析(DMA)、热失重分析(TGA)等手段对该体系进行了考察。结果表明,OAPS质量分数为5时,PLLA的羰基伸缩振动峰由1758cm-1红移至1748cm-1,OAPS氨基伸缩振动峰由3362cm-1红移至3296cm-1,说明PLLA羰基与OAPS氨基之间形成了氢键;随着OAPS质量分数由0增至5,OAPS/PLLA杂化材料的玻璃化转变温度(Tg)由47℃升高至56℃,熔融温度(Tm)由141℃升高至146℃,储能模量由1100MPa增至1250MPa;OAPS的加入没有改变PLLA的热分解温度。
Using the method of solution blending, different mass fractions of clathrated aminopropyl polysilsesquioxane (OAPS) and polylactic acid (PLLA) hybrid materials were prepared. The system was investigated by Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), dynamic thermomechanical analysis (DMA) and thermogravimetric analysis (TGA). The results showed that the carbonyl stretching vibration peak of PLLA red-shifted from 1758cm-1 to 1748cm-1 and the stretching vibration peak of OAPS red-shifted from 3362cm-1 to 3296cm-1 when the mass fraction of OAPS was 5, indicating that the PLLA carbonyl group and OAPS amino group Hydrogen bond was formed. With the increase of OAPS content from 0 to 5, the glass transition temperature (Tg) of OAPS / PLLA hybrid material increased from 47 ℃ to 56 ℃, and the melting temperature (Tm) increased from 141 ℃ To 146 ℃, the storage modulus increased from 1100MPa to 1250MPa; addition of OAPS did not change the thermal decomposition temperature of PLLA.