采用差示扫描量热仪研究了增容剂和稀土β成核剂对聚丙烯/硫酸钙晶须复合材料非等温结晶动力学及熔融行为的影响。动力学分析表明,莫志深方法能很好地描述聚丙烯非等温结晶动力学,达到相同的结晶度,复合材料所需要的冷却速率要小于纯基体。结晶形态和熔融行为均依赖于复合材料的组成和降温冷却速率。硫酸钙晶须具有一定的β成核作用,聚丙烯接枝马来酸酐（PP-g-MAH）的加入不利于β晶型的生成。
Nonisothermal crystallization kinetics and subsequent melting behavior of isotactic polypropylene/calcium sulfate whisker composites were studied by different scanning calorimetry（DSC）.It is found that the Mo model successfully describes the kinetics data of nonisothermal crystallization.To achieve the identical degree of crystallinity,the composites need a lower cooling rate than pure PP.The results show that the crystalline structure and melting behavior of the composites depend on their component and cooling rate.It is observed that calcium sulfate whisker induces the formation of β-iPP,but compatibilizer PP-g-MAH suppresses the formation of β-iPP.Lower cooling rate is favorable for the formation of β-crystals.
参考文献
| [1] | 葛铁军,杨洪毅,韩跃新.硫酸钙晶须复合增强聚丙烯性能研究[J].塑料科技,1997(01):16-19. |
| [2] | 邹敏,王琪琳.CaSO4晶须/纳米TiO2/PP-R树脂复合材料的制备及性能[J].材料科学与工程学报,2008(06):891-895. |
| [3] | 王晓丽,朱一民,韩跃新,袁致涛.表面处理剂对硫酸钙晶须/聚丙烯复合材料的增韧（Ⅰ）[J].东北大学学报（自然科学版）,2008(10):1494-1497. |
| [4] | 莫志深.一种研究聚合物非等温结晶动力学的方法[J].高分子学报,2008(07):656-661. |
| [5] | Shen H;Wang YH;Mai KC .Non-isothermal crystallization behavior of PP/Mg(OH)(2) composites modified by different compatibilizers[J].Thermochimica Acta: An International Journal Concerned with the Broader Aspects of Thermochemistry and Its Applications to Chemical Problems,2007(1/2):27-34. |
| [6] | Menyhard A;Varga J .The effect of compatibilizers on the crystallisation, melting and polymorphic composition of beta-nucleated isotactic polypropylene and polyamide 6 blends[J].European Polymer Journal,2006(12):3257-3268. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%