Effects of Nucleating Agent on Nonisothermal Crystallization of Syndiotactic Polystyrene

Joon-Yong Park; Moo Hyun Kwon; Young Sil Lee; O Ok Park

Korean Journal of Chemical Engineering, Vol.17, No.3, 262-265, May, 2000

DOI10.1007/BF02699037 Export Citation

Effects of Nucleating Agent on Nonisothermal Crystallization of Syndiotactic Polystyrene

Joon-Yong Park, Moo Hyun Kwon¹, Young Sil Lee¹, and O Ok Park^{1, †}

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

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The effects of nucleating agent on nonisothermal crystallization were examined for syndiotactic polystyrene (SPS) using Differential Scanning Calorimetry (DSC). The crystallization peak temperature T_c, 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 T_c showed lower level in SPS/DMBS than SPS/talc.

Keywords:Syndiotactic Polystyrene;Crystallization;Recrystallization;Nucleation Agent;DMBS;Talc

[References]

Cimmino S, Di Pace E, Martuscelli E, Silvestre C, Polym. Commun., 32, 251 (1991)
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[1] Cimmino S, Di Pace E, Martuscelli E, Silvestre C, Polym. Commun., 32, 251 (1991)

[2] Dias ML, "Styrene, Stereospecific Polymerization," Polymeric Materilas Encyclopedia, Salamone, J.C., et al. ed., CRC Press, Inc., Boca Raton, 10, 8014 (1996)

[3] Gianotti G, Valvossori A, Polymer, 31(3), 473 (1990)

[4] Guerra G, Vitagliano VM, De Rosa C, Petraccone V, Corradini P, Macromolecules, 23, 1539 (1990)

[5] Ishihara N, Kumamoto M, Uoi M, EP 210615 (1986)

[6] Ishihara N, Seimiya T, Kurmoto M, Uoi M, Macromolecules, 19, 2464 (1986)

[7] Lopez LC, Cieskinski RC, Putzig CL, Wesson RD, Polymer, 36(12), 2331 (1995)

[8] Mitsuishi K, "Polypropylene (Nucleating Agents)," Polymeric Materials Encyclopedia, Salamone, J.C., et al. ed., CRC Press, Inc., Boca Raton, 9, 6607 (1996)

[9] Sweet GE, Bell JP, J. Polym. Sci. A: Polym. Chem., 10, 1273 (1972)

[10] Ulcer Y, Cakmak M, Miao J, Hsiung CM, J. Appl. Polym. Sci., 60(5), 669 (1996)

[11] Wesson RD, Polym. Eng. Sci., 34(14), 1157 (1994)

[12] Zhang R, Zheng H, Lou X, Ma D, J. Appl. Polym. Sci., 51(1), 51 (1994)