Premium
Three‐Dimensionally Ordered Macroporous Syndiotactic Polystyrene: Preparation and Characterization
Author(s) -
Yan Weidong,
Li Haiqing,
Shen Xiaoli
Publication year - 2005
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200400581
Subject(s) - polystyrene , tacticity , materials science , crystallinity , polymer chemistry , scanning electron microscope , chemical engineering , molar mass distribution , polymer , composite material , polymerization , engineering
Summary: Three‐dimensionally ordered macroporous (3DOM) syndiotactic polystyrenes with pore size in the range of 71–286 nm were fabricated by means of silica templates using (dbm) 2 Ti(OPh) 2 /MAO catalytic system. The resulting materials were characterized by NMR, SEM, powder X‐ray diffraction, GPC and DSC. The results indicated that the 3DOM syndiotactic polystyrenes were highly syndiotactic, and the pore contraction increased when the average pore diameter decreased. Compared with bulk syndiotactic polystyrenes, 3DOM syndiotactic polystyrene possessed lower molecular weight, narrower molecular weight distribution, and lower crystallinity and melting temperature.SEM image of 3DOM syndiotactic polystyrene, the inset shows the detail of the cavities.