摘要
采用纳米CaCO3的微乳化分散技术制得了一种新型氯乙烯/纳米CaCO3原位聚合PVC树脂。对该PVC树脂的流变性能、热性能和微观结构等进行了研究。实验结果表明:这种新型PVC树脂在较高剪切应变下,熔体扭矩的下降幅度比通用PVC树脂增加了近一个数量级,在Haake流变仪上测得塑化熔融时间从通用PVC树脂的6 min缩短到2.5 min。这种新型PVC树脂的微商热失重曲线(DTG)的失重速率变化最大温度从299℃上升到320℃,维卡软化点上升了9℃。此外电子显微镜测试结果表明,纳米CaCO3在PVC树脂基体内呈现了小于100 nm颗粒的均匀分散。
A novel PVC resin was prepared by in-situ polymerization of vinyl chloride and nano-CaCO3, which adopted the microemulsion dispersion technology for nano-CaCO3. The rheological properties, thermal properties and micromorphological structure of the novel PVC resin were studied. The results showed that compared to the general PVC resin, the melt torque of the novel PVC resin decreased by about one magnitude under high shear strain and its melting time reduced from 6 minutes to 2.5 minutes measured by Haake rheometer. The temperature corresponding to the greatest changes of the rate of weight loss on the curves of differential thermal gravimetric （DTG） of this novel resin rose from 299℃ to 320℃, and its Vicat Softening temperature rose by 9℃. Furthermore, electron microscope measurement results showed that the nano-CaCO3 was uniformly dispersed in PVC resin with the diameter less than 100 nm.
出处
《聚氯乙烯》
CAS
2005年第11期12-16,共5页
Polyvinyl Chloride
