A composition comprising: (a) a high melt strength material, comprising a first polymer selected from the group consisting of an elastomeric ethylene/alpha-olefin polymer and a polypropylene polymer, and (b) a high flow material, comprising a second polymer selected from the group consisting of an elastomeric ethylene/alpha-olefin polymer and a polypropylene polymer. The high melt strength material has a dynamic complex viscosity greater than, or equal to, 175,000 Poise (17,500 Pa-s), measured using parallel plate rheometry at 1 radians per second and 190 degrees Centigrade, and the high flow material has a ratio, eta*/td, less than 2500, where eta* is the dynamic complex viscosity and td is the tan delta, both measured at 1 radian per second at 190 degrees Centigrade. The composition exhibits minimal necking when extruded at high speeds and is particularly useful for making sheets via high speed extrusion.
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机译：一种组合物，其包含：（a）高熔体强度材料，其包含选自弹性体乙烯/α-烯烃聚合物和聚丙烯聚合物的第一聚合物，和（b）高流动性材料，其包含选自以下的第二聚合物选自弹性乙烯/α-烯烃聚合物和聚丙烯聚合物。该高熔体强度材料的动态复数粘度大于或等于175,000泊（17,500 Pa-s），使用平行板流变仪在每秒1弧度和190摄氏度的条件下测量，而高流动性材料的比例为： eta * / td小于2500，其中eta *是动态复数粘度，td是tanδ，两者均在190摄氏度下以1弧度/秒测量。当高速挤出时，该组合物表现出最小的缩颈，并且特别适用于通过高速挤出制备片材。
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