采用熔融缩聚法,以对苯二甲酸(PTA),1,6-己二酸(AA),1,4-丁二醇(BDO)为原料,制备了不同原料物质的量之比的对苯二甲酸/己二酸/丁二醇共聚酯(PBAT),通过傅立叶变换红外光谱(FTIR)和核磁共振氢谱(1H–NMR)测试验证了PBAT的结构和物质的量...采用熔融缩聚法,以对苯二甲酸(PTA),1,6-己二酸(AA),1,4-丁二醇(BDO)为原料,制备了不同原料物质的量之比的对苯二甲酸/己二酸/丁二醇共聚酯(PBAT),通过傅立叶变换红外光谱(FTIR)和核磁共振氢谱(1H–NMR)测试验证了PBAT的结构和物质的量之比,利用差示扫描量热(DSC)法和热重(TG)分析对PBAT进行了热性能测试,采用X射线衍射(XRD)表征了PBAT共聚酯的结晶性能,用电子单纤强力仪测试了PBAT共聚酯纤维的拉伸性能。结果表明,成功地合成了设计比例的PBAT,随着PTA含量的增加,共聚酯的熔融温度从162.78℃提高到了212.20℃,质量损失5%的分解温度由369.17℃提升到了375.94℃,共聚酯纤维的断裂强度逐渐增加,最高可达3.04 c N/dtex,共聚酯的结晶度也增加。PBAT被广泛应用于片材、地膜、包装、发泡等。展开更多
Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/...Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/20 to 20/80 by melt mixing method. Differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), dynamic mechanical thermal analysis (DMA), polarizing optical microscopy (POM) and wide angle X-ray diffractometer (WAXD) were used to study the miscibility and crystallization behavior of PHBHHx/PBSA blends. Experimental results indicate that PHBHHx is immiscible with PBSA as shown by the almost unchanged glass transition temperature and the biphasic melt.展开更多
文摘采用熔融缩聚法,以对苯二甲酸(PTA),1,6-己二酸(AA),1,4-丁二醇(BDO)为原料,制备了不同原料物质的量之比的对苯二甲酸/己二酸/丁二醇共聚酯(PBAT),通过傅立叶变换红外光谱(FTIR)和核磁共振氢谱(1H–NMR)测试验证了PBAT的结构和物质的量之比,利用差示扫描量热(DSC)法和热重(TG)分析对PBAT进行了热性能测试,采用X射线衍射(XRD)表征了PBAT共聚酯的结晶性能,用电子单纤强力仪测试了PBAT共聚酯纤维的拉伸性能。结果表明,成功地合成了设计比例的PBAT,随着PTA含量的增加,共聚酯的熔融温度从162.78℃提高到了212.20℃,质量损失5%的分解温度由369.17℃提升到了375.94℃,共聚酯纤维的断裂强度逐渐增加,最高可达3.04 c N/dtex,共聚酯的结晶度也增加。PBAT被广泛应用于片材、地膜、包装、发泡等。
基金The National Natural Science Foundation of China (No. 20374032) and Tianjin Science and Technology Key Project (No. 05YFSZSF02200)
文摘Blends of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) (PHBHHx) and poly(butylene succinate-adipate) (PBSA), both biodegradable semicrystalline polyesters, were prepared with the ratio of PHBHHx/PBSA ranging from 80/20 to 20/80 by melt mixing method. Differential scanning calorimetry (DSC), thermogravimetry analysis (TGA), dynamic mechanical thermal analysis (DMA), polarizing optical microscopy (POM) and wide angle X-ray diffractometer (WAXD) were used to study the miscibility and crystallization behavior of PHBHHx/PBSA blends. Experimental results indicate that PHBHHx is immiscible with PBSA as shown by the almost unchanged glass transition temperature and the biphasic melt.
