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Wplyw tlenku cynku na wlasciwosci kauczukow etylenowo-propylenowych

机译：氧化锌对乙丙橡胶性能的影响

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Inverse gas chromatography was used to study the monoallyl maleate- or monotetrahydrophthalate (THA)-modified zinc oxide surface properties. The modification reduced both the dispersive components of the ZnO surface energy and the parameters of interactions with polar substances (Table 1). Rheometric and mechanical properties of ethylene-propylene rubber (EPR) and ethylene-propylene-diene rubber (EPDR) were studied in relation to the addition of (mono- and di-)allyl maleate or (mono- and di-)allyl tetrahydrophthalate or itaconic acid. The diallyl esters were found to act as dicumyl peroxide curing co-agents in ethylene/propylene copolymers and to increase the crosslink density in the elastomers (Table 2). The monoallyl esters acted similarly, yet only when ZnO was present. The ZnO modified with these esters was less efficient than the unmodified ZnO as an activator of sulfur curing of the ethylene/propylene/diene terpolymer (Table 3). The mechanical property data (Tables 4,5) showed the ZnO modified with the curing co-agents. especially with those containing the carboxylic group, to reinforce EPR more than did the unmodified ZnO. The vulcanizates appeared to contain ionic aggregates acting as a type of slipping, "network nodes" which could be split by trichloroacetic acid or ammonia.
机译：反相气相色谱法用于研究单烯丙基马来酸酯或单四氢邻苯二甲酸酯（THA）修饰的氧化锌表面性能。改性同时降低了ZnO表面能的分散成分和与极性物质相互作用的参数（表1）。研究了乙烯-丙烯橡胶（EPR）和乙烯-丙烯-二烯橡胶（EPDR）的流变学和力学性能，涉及添加（单和二）烯丙基马来酸酯或（单和二）烯丙基四氢邻苯二甲酸酯或衣康酸。发现二烯丙基酯在乙烯/丙烯共聚物中充当过氧化二枯基的固化助剂，并增加弹性体中的交联密度（表2）。单烯丙基酯的作用类似，但仅当存在ZnO时才起作用。用这些酯改性的ZnO比未改性的ZnO作为乙烯/丙烯/二烯三元共聚物硫硫化的活化剂的效率低（表3）。力学性能数据（表4，5）显示了用固化助剂改性的ZnO。特别是含羧基的那些，与未改性的ZnO相比，对EPR的增强更大。硫化橡胶似乎含有离子性聚集体，起一种滑脱的“网络节点”的作用，可以被三氯乙酸或氨分解。

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