微发泡聚丙烯复合材料发泡行为研究.pdf

现代料加工应用2012年第24卷第2期
MODERN PLASTICS PROCESSING AND APPLICATIONS
试验研究
微发泡聚丙烯复合材料发泡行为研究
龚维·2何颖张纯2李宏1何力2
(1.贵州师范大学材料与建筑工程学院,贵州贵阳550014;
2.国家复合改性聚合物材料工程技术研究中心,贵州贵阳,550014)
摘要:以PP(聚丙烯)为基体材料,分别添加发泡剂母粒、发泡剂和助剂母粒及发泡剂、助剂、成核剂母粒,在二次开模条
件下注塑制备微发泡PP复合材料,分析了发泡助剂及成核剂对微发泡复合材料发泡行为的影响规律。结果表明,添加发泡
助剂以后,PP体系的发泡质量得到明显改善;助剂和成核剂同时添加,徽发泡PP体系的发泡质量最好,泡孔平均直径为
26.79gm,泡孔密度达到4.76×10°个/cm3
关镜词:丙烯成核发泡行为泡孔直径泡孔密度
Study on Foaming Behavior of Microcellular
Foam Polypropylene Composites
Gong Wei].2 He Ying Zhang Chunli Hong He Li?
(1. School of Material and Architectural Engineering, Guizhou Normal University
Guiyang, Guizhou, 550014 2. National Engineering Research Center for Compounding
and Modification Polymeric Materials, Guiyang, Guizhou, 550014)
Abstract: By taking PP as basic materials, foaming agent master batch, foaming agent and
additives, foaming agent and additives and nucleating agent respectively was added into polypro
pylene. The microcellular foam PP composites was made under the condition of twice-open
mold. The effect rule of additives and nucleating agent on foaming behavior was analyzed in
microcellular foam composites. The results show that foaming quality of PP system is im
proved significantly after adding additives. There is the most ideal foaming effects in microcel
lular foam composites after adding promoter and nucleating agent. The cell diameter is 26.79
um and cell density is4.76×10° cells/cm
Key words: polypropylene; nucleating agent; foaming behavior; cell diameter; cell
将非常小的泡孔引人到塑料制品中去,达到纳米硅酸盐能显著改善PP的泡孔形态,提高
既降低原材料成本,又能提高性能的双重效PP泡沫材料的压缩弹性模量;当纳米硅酸盐的
果り。方少明采用AC发泡剂,注射成型的用量为4%时,泡沫密度、泡孔直径、泡孔密度及
方法,对CaCO交联聚丙烯(PP)复合体系的注泡孔壁厚均较为理想。可是,未见发泡助剂和成
塑进行了研究。大量CaCO3(质量分数80%)的核剂同时作用对PP发泡行为的研究报道。
加人提高了熔体的黏度,有利于气泡的稳定,对
发泡质量有一定的改善,所得PP/CaCO3复合材
收稿日期:2011-1-09;修改稿收到日期:2012-02-05。
作者简介:龚维,副教授,博士,主要研究方向为高分子结构
料的综合性能优良,比PP降低成本30%。郦华
与性能。E-mail:gongwel1974@126.com。
兴等采用马来酸酐改性的PP作为基体树脂,
*通讯联系人,E-mail:prclihel@163.com
在发泡体系中添加纳米硅酸盐,研究了纳米硅酸
基金项目:贵州省工业攻关项目黔科合GY字(2011)3011,
盐对PP泡沫材料各项性能的影响。结果表明,
国家973前期项目2007CB616912。