文献类型：期刊文献

中文题名：加工参数对微孔注塑聚醚砜力学性能的影响

英文题名：Effect of Processing Conditions on the Mechanical Properties of Microcellular Injection Molded Polyethersulfone

作者：刘艳涛[1];刘涛[1];赵玲[1];袁渭康[1]

机构：[1]化学工程联合国家重点实验室,华东理工大学,上海200237

年份：2011

卷号：27

期号：2

起止页码：118

中文期刊名：高分子材料科学与工程

外文期刊名：Polymer Materials Science & Engineering

收录：CSTPCD;;EI(收录号：20111713936068);Scopus;北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

基金：上海市科委科技启明星计划(08QA1402200)

语种：中文

中文关键词：聚醚砜;超临界流体;微孔注塑;力学性能

外文关键词：polyethersulfone; supercritical fluids; microcellular injection molding; mechanical property

摘要：通过正交实验,考察了微孔注塑成型过程中各重要加工参数对微孔聚醚砜(PES)制品拉伸强度和冲击强度的影响,利用扫描电镜(SEM)观测了制品的泡孔结构。结果表明,受冷却和剪切的影响,制品表层到芯层的泡孔形态不同。较高的熔胶量和超临界流体(SCF)含量,适中的射胶压力和射胶速率以及较低的熔体温度和模具温度有利于提高制品的拉伸强度。冲击强度随着熔胶量和SCF含量的提高而增大,随着射胶压力、射胶速率、熔体温度和模具温度的提高先增大后减小。
This work was aimed at studying the effect of various processing parameters on mechanical properties of resulting microcellular injection molded polyethersulfone（PES） based on a design of experiments（DOE） matrices.The microcellular structures of the molded samples were investigated using scanning electron microscope（SEM）.SEM micrographs show that cell morphologies vary from surface to core due to the cooling and shearing.A statistical design analysis was used to identify the optimal processing conditions for mechanical properties.It is shown that high levels of shot size and supercritical fluids（SCF） content,moderate levels of injection pressure and injection speed,and low levels of melt temperature and molding temperature are facilitated to obtain microcellular injection molded PES with satisfactory tensile strength.The impact strength increases with increasing shot size and SCF content.However,it increases at first then decreases with increasing the injection pressure,injection speed,melt temperature and molding temperature.