磷石膏/赤泥对高密度聚乙烯结晶的影响  

Effect of Phosphogypsum/Red Mud on Crystallization of High-density Polyethylene

作　　者：程舒雅 雷阳 张凯 刘玉飞 何敏 CHENG Shuya;LEI Yang;ZHANG Kai;LIU Yufei;HE Min(Department of Polymer Material and Engineering,College of Materials and Metallurgy,Guizhou University,Guiyang 550025,China;Material Innovation Base of Guizhou Province,Guiyang 550014,China)

机构地区：[1]贵州大学材料与冶金学院高分子材料与工程系,贵州贵阳550025 [2]贵州省材料创新基地,贵州贵阳550014

出　　处：《塑料工业》2022年第6期170-174,共5页China Plastics Industry

基　　金：贵州省科技支撑计划项目(黔科合支撑[2020]4Y045号);贵州省教育厅重点领域项目(黔教合KY字[2021]311);国家重点研发计划项目(2018YFC1903501)。

摘　　要：采用差示扫描量热仪(DSC)对磷石膏(PG)、赤泥(RM)、磷石膏赤泥混合物(PG/RM)改性高密度聚乙烯(HDPE)的结晶过程及结晶动力学进行了研究。结果表明,PG、RM、PG/RM的加入可以提高HDPE的结晶峰值温度(T_(p)),同时增加结晶度(X_(c)),其中PG/RM的效果最好,相比HDPE,T_(p)增加了3.7℃,X_(c)增加近6%。从等温动力学来看,PG、RM、PG/RM的加入没有改变HDPE的n值,但提高了HDPE的结晶速率常数(k)和结晶速率(G),缩短了半结晶时间(t_(1/2))和结晶速率最快的时间(t_(max)),其中PG/RM的效果最好。在120℃的结晶温度下,相比于HDPE,PG/RM/HDPE的k值提高了18倍,G提高了2.7倍,t_(1/2)缩短了73%,t_(max)缩短了71%。The crystallization process and isothermal crystallization kinetics of high density polyethylene(HDPE)modified by phosphogypsum(PG),red mud(RM),mixture of PG/RM were studied through differential scanning calorimeter(DSC).The results show that the addition of PG,RM and PG/RM could increase the crystallization peak temperature(T_(p))and crystallinity(X_(c))of HDPE,and PG/RM has the best effect.Comparing with HDPE,T_(p) has increased 3.7℃and X_(c) increases by nearly 6%.According to isothermal crystallization kinetics,the addition of PG,RM and PG/RM could not change the n value of HDPE,but increases the crystallization rate constant k and crystallization rate G,shortens the half crystallization time t_(1/2) and fastest crystallization rate time t_(max).Among them,PG/RM has the best effect.At crystallization temperature of 120℃,comparing with HDPE,the k value of PG/RM/HDPE increases by 18 times,G increases by 2.7 times,t_(1/2) decreases by 73%and t_(max) decreases by 71%.

关 键 词：高密度聚乙烯 磷石膏 赤泥 等温结晶动力学 复合材料 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业]