以特制的试样池,从高压釜中采得不同时间聚合的并保持原结构状况的聚氯乙烯树脂样品.用扫描电镜观察了这些树脂颗粒形态,并通过测试分析表明,初级粒子的成长是由聚合增长和熔结增大同时作用的结果.初级粒子再通过聚结,形成连续网络结构,使树脂颗粒呈现多孔.树脂颗粒结构主要受聚合温度、搅拌强度和分散体系等因素影响. The samples were taken from the autoclave and polymerized at different times to maintain the original structure of polyvinyl chloride resin samples.The morphology of these resin particles was observed by scanning electron microscopy and the results showed that the growth of primary particles was As a result of both the increase in the polymerization and the increase in the sintering rate, the primary particles are then coalesced to form a continuous network structure, rendering the resin particles porous. The resin particle structure is mainly influenced by the polymerization temperature, the agitation intensity and the dispersion system.