塑料科技2013，Vol.41Issue(1)：73-77,5.
聚碳酸亚丙酯/壳聚糖熔融共混改性研究
Study on Melt Blending Modification of PPC/CS
摘要
Abstract
Poly(propylene carbonate) (PPC) and chitosan (CS) blends were prepared by melt-blending method. The effects of CS content on the properties of PPC/CS blends were researched, including compatibility, glass transition temperature(Tg), heat resistance, and tensile property. And the mechanism of the modification was also discussed. The results show that the PPC/CS blends belong to simple mechanical blending composites, the introduction of CS has little effect on Tg of PPC, but it is found that the heat resistance of the PPC blends increases obviously, which would expand the processing temperature range of the blends. With the addition of CS, the thermal degradation temperature shifts to a higher temperature range. The 5% weight loss temperatures (T-5%) of PPC/CS blends are in the range of 227～235℃ , which are 51～59℃ higher than that of pure PPC. And the 50% weight loss temperatures (T-50%) of the blends are in the range of 271～280℃ , which are 12～21 ℃ higher than that of pure PPC. Compared with two weight loss steps in the TGA curve for pure PPC, there are only one weight loss step for the PPC/CS blends on the high temperature zone. Obviously, the unzipping degradation of PPC is inhibited by CS at low temperature region, and only the random degradation happened at high temperature region. Moreover, the tensile strength of the blends increases with the increasing CS content. When the CS content reaches to 20%, the tensile strength increases to 12.5 Mpa.关键词
聚碳酸亚丙酯/壳聚糖/熔融共混/耐热性能/拉伸性能Key words
Poly(propylene carbonate)/ Chitosan/ Melt blending/ Heat resistance/ Tensile property分类
化学化工引用本文复制引用
庞素娟,徐鼐,潘莉莎,徐广,汪信..聚碳酸亚丙酯/壳聚糖熔融共混改性研究[J].塑料科技,2013,41(1):73-77,5.基金项目
海南省自然科学基金(511107、510206) （511107、510206）
海南大学科研启动项目(kyqd1007) （kyqd1007）
