HDPE/PP共混物在振动剪切作用下的力学性能与形态控制  

The Morphology Control and Mechanical Properties of High Density Polyethylene and Polypropylene Blend Under Oscillating Shear Stress Field

作　　者：张弓[1] 傅强[1] 申开智[1] 蒋龙[1] 

机构地区：[1]四川大学高分子材料科学与工程系,成都610065

出　　处：《高等学校化学学报》2000年第4期633-636,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金! (批准号 :5 9773 0 2 5 );香港蒋氏工业慈善基金 !(批准号 :RC9610 5 )

摘　　要：采用高剪切引起的相容与振动剪切保压方式控制共混物的形态 ,结果表明 ,当共混体系中 HDPE/PP为 92 /8时的试样拉伸强度为 97.1 MPa,而 80 /2 0试样的缺口冲击强度为 4 5.5k J/m2 ,较静态试样分别提高4 .3倍和 9.5倍 .采用振动剪切注射技术可以针对某一组分获得高强度、高韧性的The improvement of mechanical properties of high density polyethylene(HDPE) and polypropylene(PP) blend was studied by controlling the phase miscibility vs. phase separation. Because the phase morphology and crystal morphology compete with each other, it is difficult to control the degree of the micro phase separation in an ordinary way, but with the special method of oscillating packing injection molding at a low pressure, the fine structure combined with micro phase separation and phase morphology which was studied with SEM method can be controlled to a certain extent. The high tensile strength and high toughness of HDPE/PP blends were got within the PP content in the range from 5% to 20%. The key properties of the blend were as follows: tensile strength and notched impact strength of HDPE/PP(92/8) blend specimens in the oscillating packing are 97 1 MPa and 45 5 kJ/m 2, 4 3 times and 9 5 times of the static packing specimens respectively. [WT5HZ]

关 键 词：振动剪切注射 聚乙烯 聚丙烯 力学性能 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]