Effect of internal phase contents on porous polymers prepared by a high internal phase emulsion methods.
作者：Wang-Fa Xu, Rui Bai, Fa-Ai Zhang.
关键字：porous polymer; high-internal-phase emulsion; absorption; high-internal- phase-content, kinetics
论文来源：期刊
具体来源：Journal of polymer research, 2014, 21:524（IF2.019 三区）
发表时间：2014年
A series of porous polymers
poly(styrene-divinylbenzene) was synthesized by the polymerization of 9 : 1 (v/v)
styrene/divinylbenzene using high-internal-phase emulsions (HIPEs) as template,
cetyltrimethyl ammonium bromide as a surfactant in the presence of
water-miscible organic additives ethanol, with internal-phase contents varied
from 82.5 to 94.0%. The effects of the internal-phase contents on
the microstructure of the resulting polymers were characterized by scanning
electron microscopy and mercury intrusion porosimeter. The apparent density,
compressive strength, water and toluene absorption and release behavior of the
polymers with different porosity were investigated. The results showed that the
properties of the porous polymer were significantly influenced by the internal-phase
content. The increase in the internal-phase content increased the pore volume,
thus increased the water and toluene absorption values, but decreased the apparent
densities and the compressive strength of the porous polymers. The highest
water and toluene absorption values were found for the sample prepared with the
highest internal-phase content (94.0%), which reached 11.65 and 21.64 cm3/g
(based on the weight of the porous polymer), respectively. The water and
toluene absorption kinetics of the porous polymers were well described by a pseudo-second-order
kinetic model. The toluene release rates of the porous polymers were increased
with the increased internal-phase content.