Template-synthesis of Ordered Macroporous Syndiotactic Polystyrene Using Silica Colloidal Crystals

Chem. J. Chinese Universities ›› 2002, Vol. 23 ›› Issue (2): 330.

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Template-synthesis of Ordered Macroporous Syndiotactic Polystyrene Using Silica Colloidal Crystals

YAN Wei-Dong¹, LI Dan^2,3, RONG Jian-Hua², YANG Zhen-Zhong²

1. Institute of Polymer Scienceand Engineering, School of Chemical Engineering, Hebei University of Technology, Tianj in 300130, China;
2. State Key Laboratory of Polymer Physics and Chemistry, Center for Molecular Science, Instituteof Chemistry, Chinese Academy of Sciences, Beijing 100080, China;
3. Department of Petrochemical Engineering, Daqing Petroleum Institute, Anda 151400, China

Received:2001-08-20 Online:2002-02-24 Published:2002-02-24

Abstract

Abstract: A rigid silica colloidal crystal template was formed by self-assembly of the monodispersed silica dispersion prepared according to Stöber method. Within the interstitial void of the template, β-diketonate titanium complexes[(dbm)₃Ti(OPh)/MAO] catalyzed polymerization of styrene was carried out to form syndiotactic polystyrene(sPS)/silica composites. The titled ordered macroporous syndiotactic polystyrene was achieved by chemical decomposition of the silica template with concentrated aqueous hydrofluoric acid, which was confirmed by SEM results. FTIR spectra indicated that all silica was removed from the composites in this study. DSCrevealed that the as prepared macroporous sPSwas significantly different from the bulk one, and the unique properties were inherent rather than from the enforcement effect by the silica template. Further investigation concerning the inherent microstrucutures about the molecular weight and its distribution, tacticity of the styrene etc . and their dependence on the confinement is in progress.

Key words: Template synthesis, Syndiotactic polystyrene, Ordered macroporous materials

CLC Number:

O623.13

TrendMD:

YAN Wei-Dong, LI Dan, RONG Jian-Hua, YANG Zhen-Zhong. Template-synthesis of Ordered Macroporous Syndiotactic Polystyrene Using Silica Colloidal Crystals[J]. Chem. J. Chinese Universities, 2002, 23(2): 330.

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Template-synthesis of Ordered Macroporous Syndiotactic Polystyrene Using Silica Colloidal Crystals

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