中文摘要：

采用VCM滴加的方法,部分缓解了低温条件下HPVC树脂聚合时传热难的问题,并研究了VCM滴加速率对HPVC树脂性能的影响。研究结果表明：随着VCM滴加速率的增大,HPVC树脂的数均相对分子质量（Mn）降低,相对分子质量分布指数（Mw/Mn）变宽,平均粒径（D50）增大,粒径分布变宽,表观密度（BD）增加,吸油率（CPA）有所下降,单体最终的转化率下降;VCM滴加速率的减慢有利于提高HPVC树脂的热稳定性;当VCM滴加速率为10g/min时,数均相对分子质量最大,相对分子质量分布和粒径分布均一,树脂颗粒最细,表观密度最小,吸油率最大。

英文摘要：

Iy eontrolling VCM feeding rate,this research partly eases the heat transfer problem in HPVC polymerization under low tompcrature condition.and probes into the effect of VCM feeding rate on HPVC property. Results： With the increase of VCM feeding rate, HPVC number average molecular weight（Mn） reduces, polydispersity index（Mw/Mn） increases, mean parti- cle size of HPVC increases, the particle size distribution（PSD）widens, the bulk density（BD） increases, cold plasticizer absorp-tion（CPA）and monomer conversiorl decreases. Reducing VCM feeding rate could improve HPVC thermal stability. When VCM feeding tale is 10 g/min, HPVC number average molecular weight reaches the maximum,and molecular weight distributions and particle size distribution are even,with the thinnest particle,smallest bulk density,and largest oil absorptionrate.