摘要
在 2 .5万t/aPVC生产装置上实现了纳米碳酸钙与VCM的原位聚合 ,生产出的PVC树脂的表观密度为 0 .5 7～ 0 .6 1g/mL ,增塑剂吸收量为 19.0 %～ 2 5 .6 %。随着纳米乳液的增加 ,聚合时间缩短 ,树脂白度增加。当纳米PVC用量分别为 0、3%、4 .5 %时 ,其最大扭矩分别为 32 .2 6、2 9.19、2 7.4 8N·m ,平衡扭矩分别为 17.6 5、15 .34、14 .4 8N·m ;当纳米PVC树脂用量分别为 3%、4 .5 %时 ,测得其冲击强度、拉伸强度、维卡软化温度分别为 38.5、6 8.9kJ/m2 ,6 9.2、74 .8MPa ,81.0、85 .0℃ ,而用普通PVC测得这三项指标分别为15 .5kJ/m2 、6 1.9MPa、79℃。
The in-situ polymerization of nano-calcium carbonate with VCM was accomplished in the 25 kt/a PVC facilities and the obtained PVC resin had apparent density 0.57～0.61 g/mL,absorption of plasticizers 19.0%～25.6%.Increasing the amount of nano-emulsion,the polymerization time shortened and the whiteness of resin increased.When the ratio of nano-PVC in the resin was 0,3% and 4.5%,resp.the maximum torsion moment was 32.26,29.17 and 27.48 N·m and equilibrium torsion moment 17.65,15.34,14.48 N·m respectively.When the ratio of nano-PVC in it was 3% and 4.5%,resp.the impact strength,tensile stress,and Vicat softening temperature were 38.5,68.9 kJ/m 2,69.2,74.8 MPa,and 81.0,85.0 ℃respectively,vs.15.5 kJ/m 2,61.9 MPa,79 ℃ of those of general PVC.
出处
《聚氯乙烯》
CAS
2002年第3期15-17,共3页
Polyvinyl Chloride
关键词
纳米碳酸钙
聚氯乙烯
微乳液
原位聚合
nano-calcium carbonate
PVC
microemulsion
in-situ polymerization
