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INFLUENCE OF THE NETWORK ON THE INTERACTION PARAMETER IN SYSTEM EPDM VULCANIZATE-SOLVENT

机译:网络对系统EPDM硫化溶剂中相互作用参数的影响

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Swelling measurements in six organic solvents were carried out on samples of dicumyl peroxide crosslinked ethylene-propylene-diene (EPDM) having various crosslink densities. The Flory-Huggins interaction parameter chi was determined for EPDM vulcanizates 312 and 812 as well as their mixture 312/812 using the Flory-Rehner equation. The results show that the chi parameter for the crosslinked polymer is greater than for the uncrosslinked one and is a linear function of the crosslink density. The swelling behavior of the networks were also interpreted by the Flory-Erman theory using the structural factor F-4' to characterize the network and its behavior during the swelling. The obtained chi values indicate that broadening of the molecular mass distribution, in the Gaussian region of distribution, mixture 312/812, increases interactions with solvents. (C) 1997 John Wiley & Sons, Inc. [References: 21]
机译:在具有各种交联密度的过氧化二枯基交联的乙烯-丙烯-二烯(EPDM)样品上,在六种有机溶剂中进行溶胀测量。使用Flory-Rehner方程确定EPDM硫化胶312和812及其混合物312/812的Flory-Huggins相互作用参数chi。结果表明,交联聚合物的chi参数大于未交联聚合物的chi参数,并且是交联密度的线性函数。 Flory-Erman理论还解释了网络的膨胀行为,使用结构因子F-4'来表征网络及其在膨胀期间的行为。获得的chi值表明,在高斯分布区域(混合物312/812)中,分子量分布的变宽会增加与溶剂的相互作用。 (C)1997 John Wiley&Sons,Inc. [参考:21]

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