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Influence of the percentage of gel content on impact strength of cross-linked rotationally moulded parts

机译:凝胶含量百分比对交联旋转模塑部件冲击强度的影响

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Crosslinking of polyethylene changes the chemical structure of the original thermoplastic polymer. The initial thermoplastic material consists of linear polymer chains and this is transformed into a polymer network with rubber elastic properties. Radical activity during peroxide or radiation crosslinking leads to polymer chain scission, formation of short chain fragments and crosslinking. The resulting polymer network can, therefore, be described as a fairly homogeneous randomised statistical alkyl-chain network. Average molecular weights between crosslinks, gel content (crosslink density) and the solvent swelling factor are the main parameters for characterising the structure [1].
机译:聚乙烯的交联改变原始热塑性聚合物的化学结构。初始热塑性材料由线性聚合物链组成,将其转化为具有橡胶弹性性质的聚合物网络。过氧化物或辐射交联期间的激进活性导致聚合物链裂变,形成短链片段和交联。因此,所得的聚合物网络可以被描述为相当均匀的随机统计烷基链网络。交联之间的平均分子量,凝胶含量(交联密度)和溶剂溶胀因子是用于表征结构的主要参数[1]。

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