聚碳酸酯-聚二甲基硅氧烷共聚物的制备及其对聚碳酸酯的改性  

Preparation of Polycarbonate-Polydimethylsiloxane Copolymer and Its Modification on Polycarbonate

作　　者：王建[1] 薛锋[1] 李白雪[1] 丁恩勇[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广东广州510640

出　　处：《高分子材料科学与工程》2017年第2期164-166,171,共4页Polymer Materials Science & Engineering

摘　　要：为了实现聚碳酸酯的回收和循环利用,利用化学降解法实现聚碳酸酯(PC)的可控降解,得到端羟基聚碳酸酯。利用氯封端的聚二甲基硅氧烷与端羟基聚碳酸酯反应得到聚碳酸酯-聚二甲基硅氧烷(PC-PDMS)共聚物,采用红外、核磁、热重分析对共聚物进行了表征。测试结果表明,共聚物中PDMS的质量分数为37.73%,共聚物的热稳定性介于PC和降解产物之间。采用双螺杆挤出机制备PC/PC-PDMS共混物,用毛细管流变仪测试其流动性能。共混物注塑成标准样条用于力学性能测试,结果表明PC的缺口冲击强度得到提高。In order to achieve recycle of polycarbonate （PC）, hydroxy-terminated polycarbonate was prepared by controlled degradation of PC. Polycarbonate polydimethylsiloxane copolymer （PC-PDMS） was prepared by reaction of cholrine-terminated polydimethysiloxane and hydroxy-terminated polycarbonate. Infrared spectroscopy, nuclear magnetic resonance and thermo gravimetric were used to characterize the copolymer. Test results show that PDMS accounts for 37.73% of the mass fraction of copolymer, the thermal stability of copolymer falls between PC and hydroxy-terminated polycarbonate. PC/PC-PDMS blends were prepared by twin-screw extruder and characterized through capillary rheometer. Then the blends were injected into standard spline for mechanical properties testing. Test results show improved notched impact strength but reduced tensile strength.

关 键 词：可控降解 共聚物 共混 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]