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选择低密度聚乙烯(LDPE)为主体材料,二苯醚(DPE)为稀释剂,研究了淬冷温度、粗化时间等影响液滴生长的动力学因素对热诱导相分离法(T IPS)制备LDPE/DPE微孔膜结构的影响。结果表明,在相同粗化时间的条件下,随着LDPE/DPE体系冷却温度的逐渐升高,孔径逐渐变大。对于质量百分数为20%LDPE/DPE体系,在结晶温度以下(0℃、30℃、60℃)粗化时,温度对微孔膜的孔径影响较小。而在90℃的恒温条件粗化时,体系始终处在液-液相分离区域,最终得到微孔膜的孔径接近5μm。在结晶温度以下(60℃)进行恒温粗化,粗化时间对微孔膜的孔径影响不大;而在结晶温度以上(90℃)进行恒温粗化时,则是随着粗化时间的延长,微孔膜的孔径逐渐变大。
LDPE as main material and diphenyl ether (DPE) as diluent were used to study the influence of quenching temperature and coarsening time on the kinetics of droplet growth on the thermal induced phase separation (TPS) Effect of Preparation of LDPE / DPE Microporous Membrane Structure. The results show that under the same roughening time, the pore size gradually increases with the increase of the cooling temperature of LDPE / DPE system. For the 20 wt% LDPE / DPE system, the temperature had little effect on the pore size of the microporous membrane when roughened below the crystallization temperature (0 ° C, 30 ° C, 60 ° C). When the temperature is 90 ℃, the system is always in the liquid-liquid separation area, and the pore size of the obtained microporous membrane is close to 5μm. The coarsening time has little effect on the pore size of the microporous membrane when the temperature is below 60 ° C. When the temperature is coarsened above the crystallization temperature (90 ° C), the roughening time is prolonged , The pore size of the microporous membrane gradually becomes larger.