基于均匀设计制备发泡聚丙烯.pdf

第14卷第5期
建筑材料学报
2011年10月
JOURNAL OF BUILDING MATERIALS
文章编号:1007-9629(2011)05-0615-05
基于均匀设计制备发泡聚丙烯
公维光,朱成,郑柏存
(华东理工大学体育新材料研发中心,上海200237)
摘要:以高熔体强度聚丙媂为基体树脂,通过均匀设计试验制备了发泡聚丙烯,考察了原籵配方和成
型工艺条件参数对发泡聚丙烯泡孔尺寸和表观密度的影响,并回归分析出了发泡聚丙烯泡孔尺寸、表
观密度与各参数之间的关系,找出了主要影响因素,得到了聚丙烯发泡的最佳原料配方和成型工艺条
件.结果表明:助发泡剂ZnO和模头温度是影响聚两烯发泡的主要因素;所预测的发泡聚丙斾泡孔尺
寸和表观密度与实测值基本相符;聚丙烯发泡的最住原料配方及成型工艺条件为:每100g基体树脂
中ADC为2.633g,ZnO为0.533g,ZnSt为0.542g,SiO2为0.634g;螺杆温度为187.0℃,模头温度
为156.0℃,螺杆转速为16.0r/min,此时发泡聚丙烯泡孔尺す为68.53gm
关键词:均匀设计;聚丙烯;发泡;泡孔尺寸;表观密度
中图分类号:TQ325.14
文献标志码:Adoi:10.3969/.issn.1007-9629.2011.05.007
Preparation of Polypropylene Foam Based on Uniform Design
GONG Wei-guang, ZHU Cheng, ZHENG Bai-cun
Advanced Sports Material Research Center, East China University of Science & Technology, Shanghai 200237, China
Abstract: Polypropylene foam was prepared with uniform design using high melt strength polypropylene as
raw resin. The effects of formulation and process conditions on the cell size and apparent density of poly-
propylene foam were investigated. The relationships between the cell size, apparent density of polypropyl-
ene foam and parameters were studied by using regression analysis, the main influencing factors, the best
formulation and process conditions were found. The results show that the main factors influencing cell size
and apparent density are assistant foaming agent Zno and die temperature. The predictive values of cell
size and apparent density of polypropylene foam are basically consistent with those from verification test.
The best formulation and process conditions are: ADC 2.633 g, Zno 0.533 g, Znst 0.542 g, Sio2 0.634 g
in each 100 g resin, and screw temperature 187.0C, die temperature 156.0 C, screw speed 16.0 r/min
under this condition, the cell size of polypropylene foam is 68.53 Hm.
Key words: uniform design; polypropylene; foam; cell size; apparent density
发泡聚丙烯(PP)材料是聚丙烯树脂和气体的低,适合发泡的温度区间窄,发泡过程难以控制.目
复合体,具有质量轻、热导率低、吸音、抗缓冲、耐化前,人们采用共混[2或接枝交联印等方法来政善
学腐蚀、耐高温、不吸水、不腐烂、不霉变、可回收利聚丙烯的熔体强度.髙熔体强度聚丙烯是一种带有
用、可自然降解等优良特性.发泡聚丙烯材料作为长支链的聚丙烯,在恒定应变速率下,其表现出明显
建材使用时,可使建材轻质化,并便于加工改造,不的应变硬化行为,这对减少泡孔塌陷非常有利,但目
会产生二次建筑垃圾
前有关直接用高熔体强度聚丙烯制备发泡聚丙烯的
普通聚丙烯是典型的结晶型化合物,熔体强度研究报道仍较少.另外,传统试验设计涉及的原料配
收稿日期:2010-05-17;修订日期:2010-09-29
基金项目:上海市自然科学基金资助项目(09ZR1408100)
第一作者:公维光(1975一),男,山东蒙阴人,华东理工大学讲师,博士.E- mail: yongwu@ ecust.cdu,cn