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Citation: Yu Yingning, Zhang Hongfang, Mo Zhishen, Chen Wei, Sun Chunyan. On the Crystallinity of Syndiotactic Polypropylene[J]. Chinese Journal of Applied Chemistry, ;1998, 15(6): 77-79. shu

On the Crystallinity of Syndiotactic Polypropylene

1.
Polymer Physics Laboratory, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
2.
Research Institute of Petroleum Processing SINOPEC, Beijing

Received Date: 23 March 1998
Revised Date: 2 September 1998

A formula for calculating the crystallinity of syndiotactic polypropylene samples synthesized by metallocene catalyst with constant syndiotacticity has been derived on the basis of W AXD intensity and the graphic resolution method. The calculated by this formula values have been compared with those obtained by DSC and density measurements. They all give a maximum value at T_c(95℃) of the polymer, while the calculated values are more or less higher.
- syndiotactic polypropylene,
- crystallinity,
- W AXD,
- DSC,
- density
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