HDPE/UHMWPE改性道路排水管的形貌与流变行为研究  

Study on Morphology and Rheological Behaviors of HDPE/UHMWPE Modified Road Drain-Pipe

作　　者：姜献东[1] 黄永兰[1] 

机构地区：[1]扬州工业职业技术学院,江苏扬州225127

出　　处：《塑料科技》2017年第11期21-25,共5页Plastics Science and Technology

基　　金：扬州市科技计划项目(YZ2016092)

摘　　要：通过高温熔融法制备了高密度聚乙烯/超高分子量聚乙烯(HDPE/UHMWPE)共混物,采用脆断面SEM和振荡剪切流变测试研究了退火处理前后共混物的微观形貌与流变行为。结果表明:UHMWPE用量的增加,使共混物断面的UHMWPE丝状物结构逐渐增多,且显著提高体系的储能模量,而退火处理后丝状物消失,模量有所提高;随着UHMWPE用量的增加,UHMWPE长链与体系存在临界缠结浓度(c_e),并与储能模量(G')、损耗模量(G'')、复数黏度(|η~*|)有一定的标度关系(浓度低于c_e时:G'~c^(0.2)、G''~c^(0.07)、|η~*|~c^(0.07);浓度高于c_e时:G'~c^(1.20)、G''~c^(0.6)、|η~*|~c^(0.64));退火处理后,UHMWPE因解缠结而与体系结合能力更强,说明退火处理能够强化UHMWPE对HDPE的增强作用。High-density polyethylene/Ultrahigh molecular weight polyethylene（HDPE/UHMWPE） composite was prepared by high temperature melting method. The effect of annealing on the morphological structure and rheological behavior were investigated by scanning electron microscope（SEM） and senior rotary rheometer, respectively. With the enhancement of UHMWPE component content, filaments were raised and mechanical properties could significantly enhanced, however, filaments were disappeared and modulus was modest growth after annealing. As the component content of UHMWPE increases, the critical entanglement concentration（ce） of UHMWPE has the scaling laws with G＇, G＇＇, ｜η~＊｜,（1） before critical entanglement concentration（ce）： G＇ ~c^（0.2）, G＇＇ ~c^（0.07）、｜η~＊｜~c^（0.07）;（2） after ce： G＇ ~c^（1.20）, G＇＇ ~c^（0.6）、｜η~＊｜~c^（0.64）. After annealing treatment, the disentanglement of UHMWPE was more integrated with the matrix, which indicated annealing treatment could strengthen the enhancement effect of UHMWPE for HDPE.

关 键 词：高密度聚乙烯 超高分子量聚乙烯 热退火 流变 微观形貌 标度关系 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]