摘要
互穿网络聚合物(IPNs)是一种特殊的交联聚合物合金。本研究以聚氨酯(PU)和乙烯基酯(VER)预聚物为原料,在室温下合成了互穿网络聚合物。采用傅立叶红外光谱法跟踪了网络形成的动力学过程并进行半定量分析,研究了固化体系对互穿纲络聚合物的摩擦学性能、力学性能及光学性能等的影响。结果显示,两种预聚物在固化过程中虽遵循不同的聚合机理,却相互影响制约。通过改变引发剂和催化剂的配比得到的样品显示出不同特性。当VER引发剂的用量为0.75%,PU催化剂的用量为0.6%时,两网络可基本实现同步互穿;同步互穿网络聚合物显示出良好的耐磨性,在实验条件下涂层寿命可达28.81min,且力学性能优异,在可见光波长范围内具有良好的透光性,450nm处的透光率可达85%。
Interpenetrating polymer networks （IPNs） are unique alloys of crosslinked polymers. In our study, the polyurethane （PU） and vinyl ester resin （VER） were used as prepolymers to prepare the IPNs at room temperature. The formation processes of these IPNs were monitored by Fourier transform infrared spectroscopy （FT-IR） and were semi-quantitatively analyzed. The effects of the curing system on the tribological, mechanical and optical properties of the prepared IPNs were studied. The results show that, although the two prepolymers follow different polymerization mechanisms, during the course of curing they interfere with each other in the IPN system; and using different ratios of initiator to catalyst, the prepared IPNs show different properties. It was found that, when VER initiator of 0.75 %（wt） and PU catalyst of 0.6%（wt） were used, the two networks interpenetrating simultaneously could be realized basically, and the polymer with simultaneous interpenetrating networks （SIN） shows good wear resistance and the wear- resisting life of its coating could reach 28.81 min. Besides, the mechanical properties of the SIN are the best among those of IPNs prepared with other different weight ratios of VER initiator to PU catalyst, and the SIN also shows good transparency in the visible light region with transmittance of 85% at wave length of 450 nm.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2009年第4期661-666,共6页
Journal of Chemical Engineering of Chinese Universities
关键词
互穿网络聚合物
PU/VER
动力学
摩擦学性能
力学性能
光学性能
interpenetrating polymer networks
PU/VER
curing kinetics
tribological properties
mechanical properties
optical properties
