Melt Elongation Properties of Linear Low-Density Polyethylene

被引:1
作者
Zhong, Lei [1 ]
Liang, Ji-Zhao [2 ]
Wang, Kejian [3 ]
机构
[1] Guangxi Univ Nationalities, Guangxi Univ, Key Lab Chem & Biol Transforming Proc, Sch Chem & Chem Engn, Nanning, Peoples R China
[2] S China Univ Technol, Res Div Green Funct Mat & Equipment, Coll Ind Equipment & Control Engn, Guangzhou 510640, Guangdong, Peoples R China
[3] Beijing Univ Chem Technol, Inst Plast Machinery & Plast Engn, Beijing 100029, Peoples R China
来源
JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2015年 / 54卷 / 03期
关键词
entry converging flow; extrusion; linear low-density polyethylene; melt elongation strength; melt elongation viscosity; melt spinning flow; POLYMER MELTS; CAPILLARY EXTRUSION; CONVERGING FLOW; RHEOTENS TEST; RHEOLOGY; BEHAVIOR; BLENDS;
D O I
10.1080/00222348.2014.1000765
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The melt extensional properties of a linear low-density polyethylene (LLDPE) were measured using melt spinning techniques in a range of temperature varying from 150 to 200 degrees C, and the entry flow method in the capillary extrusion at 170 degrees C was used to investigate the effects of elongation strain rate, temperature, and extrusion velocity in the capillary on the melt elongation stress and viscosity. The melt stretching force at break decreased nonlinearly with a rise of temperature. A low melt elongation viscosity might be beneficial to improve the melt drawability. With the increase of elongation strain rate, the melt elongation stress increased while the melt elongation viscosity decreased nonlinearly. Both melt elongation stress and viscosity decreased with a rise of temperature. Under the experimental conditions, the melt elongation stress and viscosity decreased with an increase of extrusion velocity in the capillary. Moreover, the relationship between the elongation viscosity determined from the entry flow and strain rate was similar to that from the melt spinning flow.
引用
收藏
页码:295 / 305
页数:11
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