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首页> 外文期刊>Journal of Applied Polymer Science >Structure-Property Relationships of Lightly Chemical Crosslinked Poly(vinyl chloride) Thermoplastic Elastomer
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Structure-Property Relationships of Lightly Chemical Crosslinked Poly(vinyl chloride) Thermoplastic Elastomer

机译：轻度化学交联的聚氯乙烯热塑性弹性体的结构-性能关系

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摘要

Chemical crosslinked poly*(vinyl chloride) (C-PVC) was synthesized by vinyl chloride suspension polymerizaiton in the presence of diallyl phthalate (DAP) and plasticized to prepare poly(vinyl chloride) (PVC) thermoplastic elastomer (TPE) materials. The chemical crosslinking and physical crosslinking structure in chemical crosslinked PVC-TPE were investigated. It showed that the gel fraction and the crosslinking density of gel increased as the feed concentration of DAP increased. C-PVC prepared by VC/DAP copolymerizaiton was lightly crosslinked as compared with irradation crosslinked PVC. Physical entanglements would greatly influence the crosslinking dnesity of gel when the gel fraction was hgih. Chemcial crosslinking had little influence on the recrystallization behavior of PVC. A structure model of chemical crosslinked PVC-TPE was proposed, in which chemical networksacted with physical networks cooperatively. It also showed that chemical crosslinking and physical crosslinking influenced the processability and mechanical properties of chemical crosslinked PVC-TPE cooperatively. Although the processabiity of PVC-TPE deteriorated with chemical crosslinking, the dimension stability and elasticity of PVC-TPE were improved as the permanent chemcial networks were introduced.
机译：在邻苯二甲酸二烯丙基酯（DAP）存在下，通过氯乙烯悬浮聚合反应合成化学交联的聚氯乙烯（C-PVC），并进行增塑处理，制备聚氯乙烯（PVC）热塑性弹性体（TPE）材料。研究了化学交联PVC-TPE的化学交联和物理交联结构。结果表明，随着DAP进料浓度的增加，凝胶分数和凝胶的交联密度增加。与辐照交联的PVC相比，通过VC / DAP共聚制备的C-PVC轻度交联。当凝胶分数为hgih时，物理缠结将极大地影响凝胶的交联密度。化学交联对PVC的重结晶行为影响很小。提出了化学交联PVC-TPE的结构模型，其中化学网络与物理网络协同作用。还表明化学交联和物理交联共同影响化学交联的PVC-TPE的加工性能和机械性能。尽管PVC-TPE的可加工性随化学交联而降低，但引入永久性化学网络后，PVC-TPE的尺寸稳定性和弹性得到了改善。

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