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HDPE熔体连续挤出自增强的研究 (Ⅱ) 自增强试样横截面上性能的不均匀性 被引量:4

STUDY ON SELF REINFORCED HDPE FROM CONTINUOUS MELT EXTRUSION Ⅱ. PROPERTIES INHOMOGENEITY ACROSS THE CROSS SECTION OF SELF REINFORCED SAMPLE
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摘要 DSC分析表明,熔体连续挤出自增强HDPE片材表层的自增强程度要比芯部的高。借助楔形收敛流道内熔体流场(延伸应变速率)与温度场的分布规律,可知,熔体温度是导致自增强试样横截面上自增强程度不均匀的主要原因。 It has been shown by DSC analyses that the outer layer of the self reinforced HDPE sheet prepared by continuous melt extrusion has a higher self reinforcement degree than its inner core. With the aid of the distribution regularity of flow field(extensional strain rate) and temperature field of a polymer melt flowing through a wedge shaped convergent channel, it has indicate that the melt temperature is the main reason leading to the properties inhomogeneity across the cross section of the self reinforced sample.
出处 《高分子材料科学与工程》 EI CAS CSCD 北大核心 1999年第4期162-163,共2页 Polymer Materials Science & Engineering
关键词 高密度聚乙烯 熔体挤出 自增强 差动热分析 high density polyethylene melt extrusion self reinforcement differential scanning calorimetry(DSC)
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