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The distribution coefficient of oil and curing agent in PP/EPDM TPV

机译：PP / EPDM TPV中油和固化剂的分配系数

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摘要

The distribution coefficients of oil and curing agent in PP/EPDM TPV were calculated by measuring the melting point of the PP phase using differential scanning calorimetry (DSC). The PP/EPDM TPV was prepared by using a twin screw extruder and a peroxide curing agent was used. The peroxide induces the degradation of PP, resulting in the decrease of T{sub}m. The oil in PP phase also decreases the T{sub}m. Based on the T{sub}m difference among pure PP and PP/EPDM TPV before and after extraction by cylcohexane, the calculated oil distribution coefficient is 0.537. The addition sequence of PP, oil, and curing agent has a significant effect on the T{sub}m and the calculated curing agent distribution coefficient is 0.52. Both of the coefficients are less than 1. Based on the calculation of the two coefficients, a rationale design of thermoplastic vulcanizate (TPV) can be made by proper control of raw materials, addition sequence, and processing parameters.
机译：通过使用差示扫描量热法（DSC）测量PP相的熔点来计算PP / EPDM TPV中油和固化剂的分布系数。通过使用双螺杆挤出机制备PP / EPDM TPV，并使用过氧化物固化剂。过氧化物引起PP的降解，导致T {sub} m的降低。 PP相中的油也降低了T {sub} m。根据纯PP和用环己烷萃取前后的PP / EPDM TPV之间的T {sub} m差异，计算出的油分布系数为0.537。 PP，油和固化剂的添加顺序对T {sub} m有显着影响，计算出的固化剂分配系数为0.52。两个系数均小于1。基于这两个系数的计算，可以通过适当地控制原材料，添加顺序和加工参数来进行热塑性硫化橡胶（TPV）的理论设计。

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