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Preparation and characterization of high damping poly(epichlorohydrin) and poly(epichlorohydrin-co-ethylene oxide-co-allyl glycidyl ether) elastomers: I. Effect of curing system and blending on the damping properties
Reactive & Functional Polymers ( IF 4.5 ) Pub Date : 2023-02-01 , DOI: 10.1016/j.reactfunctpolym.2023.105520
Murat Şen , Orhan Soydaş , Davut Aksüt

In this study, the effect of curing system on the rheological, network structure, mechanical and damping properties of poly(epichlorohydrin) (CO) and poly (epichlorohydrin-co-ethylene oxide-co-allyl glycidyl ether) (GECO) elastomers and also blend of CO and GECO were investigated. To identify the curing system's effect on elastomers damping behavior, ethylene thiourea (ETU) and 2,4,6-Trimercapto-s-triazine (TMT) were used as curing agents. To determine the impact of blending on the damping properties of epichlorohydrin-based elastomers, the homopolymer of epichlorohydrin (CO-DP5245) and the terpolymer of epichlorohydrin (GECO-T3108) was mixed in equal proportions. It has been observed that with the use of TMT instead of ETU for both CO and GECO elastomers, the mechanical properties can be significantly increased without changing the damping behavior. CO-DP5245, which has a much higher long chain branching value than GECO-T3108, shows effective damping (tanδ > 0.3) at particularly high temperatures (between −1.7oC to +70oC), while GECO-T3108 has been found to show effective damping at low temperatures (between −41.6oC and − 8.3oC). By blending the homopolymer DP5245 and terpolymer T3108 of epichlorohydrin, it has been proven that elastomers with high damping properties can be easily prepared for moderate temperatures where these elastomers have relatively low damping properties. As a result of these studies, it has been proven that the mechanical, dynamic-mechanical, damping, and energy dissipation properties of ECH-based elastomers can be changed in a controlled manner by changing the type of curing agent by preparing compounds in the presence or absence of resin or by using high damping ECH homo and terpolymer blends.



中文翻译:

高阻尼聚(环氧氯丙烷)和聚(环氧氯丙烷-co-环氧乙烷-co-烯丙基缩水甘油醚)弹性体的制备与表征:I. 固化体系和共混对阻尼性能的影响

在本研究中,固化体系对聚(环氧氯丙烷)(CO)和聚(环氧氯丙烷-共-环氧乙烷-共-烯丙基缩水甘油醚)(GECO)弹性体的流变学、网络结构、机械和阻尼性能的影响以及研究了 CO 和 GECO 的混合物。确定固化系统对弹性体阻尼行为的影响,乙烯硫脲 (ETU) 和 2,4,6-三巯- 三嗪 (TMT) 用作固化剂。为了确定共混对环氧氯丙烷基弹性体阻尼特性的影响,将环氧氯丙烷均聚物 (CO-DP5245) 和环氧氯丙烷三元共聚物 (GECO-T3108) 按等比例混合。据观察,对于 CO 和 GECO 弹性体,使用 TMT 代替 ETU,可以在不改变阻尼行为的情况下显着提高机械性能。CO-DP5245 具有比 GECO-T3108 高得多的长链支化值, 在特别高的温度(-1.7 o C 至 +70 o C)下显示有效阻尼(tan δ > 0.3) ,而 GECO-T3108 已被发现在低温下显示出有效的阻尼(-41.6 oC 和 - 8.3 o C)。通过混合环氧氯丙烷的均聚物 DP5245 和三元共聚物 T3108,已经证明可以很容易地制备具有高阻尼特性的弹性体,以适应这些弹性体具有相对较低阻尼特性的中等温度。作为这些研究的结果,已经证明,通过在存在的情况下制备化合物来改变固化剂的类型,可以以可控的方式改变 ECH 基弹性体的机械、动态机械、阻尼和能量耗散特性或不使用树脂或使用高阻尼 ECH 均聚物和三元共聚物混合物。

更新日期:2023-02-05
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