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首页> 外文会议>Thermoplastic Elastomers Topical Conference(TPE TopCon); 20070917-19; Akron,OH(US) >Novel Ethylene/Alpha-Olefin Copolymer - Polypropylene Blends for Extruded Profiles
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Novel Ethylene/Alpha-Olefin Copolymer - Polypropylene Blends for Extruded Profiles

机译：新型乙烯/α-烯烃共聚物-挤出型材的聚丙烯共混物

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摘要

Flexible extruded profiles are used in a wide variety of applications with the dominant material being polyvinyl chloride (PVC). Until recently, it's been difficult for material engineers to find PVC alternatives that possess similar processing attributes (smooth surface and shape retention at high line speed or shear rate) at comparable cost and performance. A new class of highly branched ethylene/alpha-olefin copolymer elastomers is now available for use in extruded profile compositions. The high melt strength (HMS) elastomers can be effectively paired with HMS polypropylene (PP) (fillers and processing oil for cost-modulus adjustments are optional) to produce 70-90 Shore A hardness products with exceptional processing characteristics at line speeds similar to flexible PVC (f-PVC). Higher modulus profiles can be produced, if desired, when the PP is the majority component and the HMS elastomer is the minor component. The lower density of the olefin compounds at similar line speed to PVC will render more linear meters (feet) per hour of the olefin materials making them a cost effective alternative; and the lower glass transition temperature will offer enhanced low temperature flexibility. This paper will introduce three new polyolefin elastomers and compare the processing characteristics and physical properties of compounds produced from one of the elastomers and PP to f-PVC and thermoplastic vulcanizates (TPV) which are also used in extruded profiles.
机译：柔性挤出型材可用于多种应用，主要材料是聚氯乙烯（PVC）。直到最近，材料工程师仍很难找到具有类似加工属性（在高线速或高剪切速率下具有光滑的表面和形状保持力）且具有可比的成本和性能的PVC替代品。新型的高度支化的乙烯/α-烯烃共聚物弹性体现在可用于挤出型材组合物中。高熔体强度（HMS）弹性体可以与HMS聚丙烯（PP）有效地配对（填料和加工油用于成本模量调整是可选的），以生产70-90 Shore A硬度的产品，其线速度类似于柔性，具有出色的加工特性PVC（f-PVC）。如果需要，当PP是主要成分，而HMS弹性体是次要成分时，可以产生更高的模量分布。在与PVC相似的线速度下，较低密度的烯烃化合物将使每小时的烯烃材料的线性米数（英尺）增加，从而使其成为具有成本效益的替代方案。较低的玻璃化转变温度将提供增强的低温柔韧性。本文将介绍三种新型的聚烯烃弹性体，并比较由弹性体和PP中的一种与f-PVC和热塑性硫化橡胶（TPV）生产的化合物的加工特性和物理性能，后者也用于挤出型材。

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