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首页> 外文期刊>Journal of Polymer Materials >Tearing and Glass Transition Behavior of Thermoplastic Elastomeric Blends of High Density Polyethylene/Styrene Butadiene Rubber:Influence of Blend Ratio,Morphology and Dynamic Crosslinking
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Tearing and Glass Transition Behavior of Thermoplastic Elastomeric Blends of High Density Polyethylene/Styrene Butadiene Rubber:Influence of Blend Ratio,Morphology and Dynamic Crosslinking

机译：高密度聚乙烯/苯乙烯丁二烯橡胶热塑性弹性体共混物的撕裂和玻璃化转变行为：共混比，形态和动态交联的影响

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摘要

Blends of HDPE and SBR were prepared by the melt mixing technique at different blend ratios and their tearing and glass transition behavior were investigated.The effect of the blend composition,different cross/inking systems such as sulfur,mixed(S + DCP)and DCP systems and concentration of the peroxide curing agent on the tear properties were analyzed.Among the three crosslinking systems DCP is found to be the most effective in imparting the tear strength.The observed increase in tear strength with the crosslinking systems has been correlated to the morphology of the blend.Various two-phase models from the literature were used to fit the experimental values and it was found that upto 50 wt% of SBR the experimental values were found to be close to the Kunori and Geil model and at 70 wt% of SBR the values fit to the Halpin-Sai model.The tear fracture surfaces were examined by a scanning electron microscope.The glass transition temperature of the constituents in the compositions was examined by means of differential scanning calorimetry.In all uncross/inked compositions the T_g of HOPE phase remains unaffected by the addition of SBR.However,the T_g of SBR phase decreases on blending with HOPE.The effects of two crosslinking systems,namely,sulfur(S)and mixed systems on the glass transition temperatures of the two phases of the blends were also examined.The shift in the Tg of the SBR phase is comparatively higher than that of the HDPE phase in both cross/inked and uncross/inked blends.
机译：通过熔融混合技术，在不同的混合比例下制备了HDPE和SBR的共混物，研究了它们的撕裂和玻璃化转变行为。共混物组成，硫，混合（S + DCP）和DCP等不同交叉/油墨体系的影响分析了过氧化物固化剂的体系和浓度对撕裂性能的影响。发现在三种交联体系中DCP是赋予撕裂强度最有效的。观察到的交联体系撕裂强度的增加与形态有关使用文献中的各种两相模型拟合实验值，发现高达50 wt％的SBR实验值接近于Kunori和Geil模型，且为70 wt％。 SBR值符合Halpin-Sai模型。通过扫描电子显微镜检查撕裂表面。检查组合物中各成分的玻璃化转变温度。在所有未交联/着墨的组合物中，HOPE相的T_g均不受添加SBR的影响。然而，与HOPE共混时，SBR相的T_g降低。两种交联体系的影响，即硫还研究了共混物两相的（S）和混合体系的玻璃化转变温度。在交叉/油墨和非交叉/油墨共混物中，SBR相的Tg位移均比HDPE相的高。 。

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