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Effects of Nucleating Agent on Nonisothermal Crystallization of Syndiotactic Polystyrene
Polymer Materials Lab., Samsung Advanced Institute of Technology, 103-6, Moonji-dong, Yusong-ku, Taejon 305-380, Korea 1Dept. of Chem. Eng., Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-ku, Taejon 305-701, Korea
oopark@sorak.kaist.ac.kr
Korean Journal of Chemical Engineering, May 2000, 17(3), 262-265(4), 10.1007/BF02699037
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Abstract
The effects of nucleating agent on nonisothermal crystallization were examined for syndiotactic polystyrene (SPS) using Differential Scanning Calorimetry (DSC). The crystallization peak temperature Tc, the crystallization rate parameter (CRP), the enthalpy of crystallization and melting, and the recrystallization behavior were compared between organic (DMBS, 1,3,2,4-dis-5(3,4-dimethyl benzylidene) sorbitol) and inorganic (talc) nucleating agents. Both of the nucleation agents promoted the crystallization rate of SPS until some critical concentration of about 3,000 ppm. DMBS worked more effectively as a nucleating agent than talc, although the Tc showed lower level in SPS/DMBS than SPS/talc.
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