第45券第1期
2017年1月【材料与性能】
聚氨乙烯 Polyvinyl Chloride
PVC木塑发泡材料性能的研究
李静*，刘浩，刘容德，张桦
（中国石油化工股份有限公司齐鲁分公司研究院，山东淄博255400）
[关键词】PVC;木塑；发泡；性能；加工应用
Vol.45,No.1 Jan.，2017
【摘要】研究了PVC树脂基本性能（聚合度、分子质量分布、表观密度）、助剂（发泡剂、发泡调节剂）、木粉及加工工艺（加工温度、挤出速度)对PVC木塑发泡材料性能的影响，并进行了工业化加工试验。结果表明：PVC树脂聚合度越高，发泡材料泡孔壁厚越大，发泡及加工都变得较为困难，适宜的案合度为650~700；PVC树脂分子质量分布变宽，则发泡材料的密度增大，泡孔数量减少，泡孔增大，泡壁增厚，有申泡现象，适宜的分子质量分布指数为1.9~2.0；表观密度越高，机身压力越大，发泡材料泡孔数量越多，泡孔结构越均匀，适宜的表观密度为0.57~ 0.60mL/g。对于S=700型PVC树脂面言发泡剂ADC与助发泡剂ZnO的适宜质量比为1:0.1，且二者的总用量以1.0份为宜；发泡调节剂ZB-530的适宜用量为8份适宜的加工温度为185℃，适宜的挤出速度为20t/min。宜采用硅烷偶联剂对木粉进行表面改性，发泡剂、发泡调节剂的用量应随着木粉用量的变化面调整。工业化加工试验结果表明：根据制品及生产设备的不同对试验得出的配方和加工工艺进行调整后，可顺利生产出质量优良的产品。
[中图分类号】TQ325.3
【文献标患码】B
【文章编号】10097937(2017)01-000911
Studyon properties of PvC-basedwood-plastic composite foamed materials
LI Jing，LIUHao,LIURongde，ZHANGHua
(ResearchInstitute of QiluBranch Co.,SINOPEC,Zibo255400,China)
Key words: PVC; wood plastic; foaming; property; processing and application
Abstract: The effects of basic properties (polymerization degree, molecular weight distribution and apparent'density)of PVC resins,additives (foaming agent and foaming control agent): wood flour and processing technology （processing temperature, extrusion speed） on the properties of PVC-based wood plastic composite foamed materials were studied. The industrial processing test was carried out. The results showed that the higher the polymerization degree of PVC resins, the larger the cell wal thick-ness of foamed materials, the more difficult the foaming and the.processing were. The suitable polymeri-zation degree was 650 700. With the widening of molecular mass distribution of PVC resins, the densi-ty of foamed materials increased, the number of cells reduced, the cell wall thickness increased, and con-secutive cells occurred. The suitable molecular mass distribution index was 1. 9 2. 0. The higher the ap parent density, the greater the extruder pressure, the more the number of cells of foamed materials, the more uniform the cell structure was. The suitable apparent density was 0. 57 0. 60 mL/g. For PVC res in S 700, the suitable mass ratio of foaming agent ADC and secondary foaming agent ZnO was 1: 0. 1. Total amount of the two agents was 1 phr.The suitable amount of foaming control agent ZB 530 was 8 phr. The suitable processing temperature was 185 C, and the suitable extrusion speed was 20 r/min. The wood flour should be modified by silane coupling agent. The amounts of foaming agent and foaming control agent should be adjusted with the change of the amount of wood flour. Industrial processing test results showed that after the obtained formula and processing technology were adjusted according to differ ent products and production equipment, the products with good quality could be successfully produced.
【收稿日期］2016-03-20
【作者简介】李静（1963-），男，工程师，1985年毕业于山东师范大学，从事PVC加工应用方面的研究。
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