GLASS-FIBER-REINFORCED POLYPROPYLENE EPDM BLEND .1. MELT RHEOLOGICAL PROPERTIES

被引:27
作者
GUPTA, AK
KUMAR, PK
RATNAM, BK
机构
[1] Centre for Materials Science and Technology, Indian Institute of Technology, New Delhi
关键词
D O I
10.1002/app.1991.070420925
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Melt rheological properties of the blend of isotactic polypropylene (PP) and ethylene propylene diene rubber (EPDM) at varying ratios and of the glass fiber (GF) filled PP and PP/EPDM blend by varying both GF loading and blending ratio of the polyblend matrix are studied. Rheological measurements at 220-degrees-C in shear rate range 10(1)-10(4) s-1 were made on a capillary rheometer. Scanning electron micrographs of the extrudates are presented to show the morphology and the alignment of the glass fibers with respect to the flow direction. Variations of pseudoplasticity index, melt viscosity, and melt elasticity with EPDM content in PP/EPDM blend, and with varying GF content at any given composition of the matrix in PP/EPDM/GF ternary system, in the studied range are presented and discussed. Results on melt viscosity and melt elasticity show (i) reduced effect of GF at high shear rates on these properties and (ii) upward deviation of melt viscosity versus shear rate curve at low shear rates. A change in flow behavior in presence of GF is observed around a critical shear rate 2 x 10(3) s-1 and is attributed to the difference of interaction of GF and the dispersed rubber droplets at high and low shear rates. Elastic recovery showed nonequilibrium behavior at low shear rates.
引用
收藏
页码:2595 / 2611
页数:17
相关论文
共 24 条
[11]  
Han C.D., 1981, MULTIPHASE FLOW POLY
[12]   EFFECTS OF COUPLING AGENTS ON THE RHEOLOGICAL PROPERTIES, PROCESSABILITY, AND MECHANICAL-PROPERTIES OF FILLED POLYPROPYLENE [J].
HAN, CD ;
VANDENWEGHE, T ;
SHETE, P ;
HAW, JR .
POLYMER ENGINEERING AND SCIENCE, 1981, 21 (04) :196-204
[13]  
HAN CD, 1976, RHEOLOGY POLYM PROCE, pCH5
[14]  
HAN CD, 1975, J APPL POLYM SCI, V19, P283
[15]   VISCOUS PROPERTIES OF CALCIUM-CARBONATE FILLED POLYMER MELTS [J].
KATAOKA, T ;
KITANO, T ;
OYANAGI, Y ;
SASAHARA, M .
RHEOLOGICA ACTA, 1979, 18 (05) :635-639
[16]   VISCOSITY OF PARTICLE FILLED POLYMER MELTS [J].
KATAOKA, T ;
KITANO, T ;
SASAHARA, M ;
NISHIJIMA, K .
RHEOLOGICA ACTA, 1978, 17 (02) :149-155
[17]   RELATIVE VISCOSITIES OF POLYMER MELTS FILLED WITH INORGANIC FILLERS [J].
KITANO, T ;
KATAOKA, T ;
NISHIMURA, T ;
SAKAI, T .
RHEOLOGICA ACTA, 1980, 19 (06) :764-769
[18]   EXPERIMENTAL-STUDY OF THE INFLUENCE OF CARBON-BLACK ON THE RHEOLOGICAL PROPERTIES OF A POLYSTYRENE MELT [J].
LOBE, VM ;
WHITE, JL .
POLYMER ENGINEERING AND SCIENCE, 1979, 19 (09) :617-624
[20]   INFLUENCE OF TITANIUM-DIOXIDE ON RHEOLOGICAL AND EXTRUSION PROPERTIES OF POLYMER MELTS [J].
MINAGAWA, N ;
WHITE, JL .
JOURNAL OF APPLIED POLYMER SCIENCE, 1976, 20 (02) :501-523