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Effects of nanocrystalline calcium oxide particles on mechanical, thermal, and electrical properties of EPDM rubber
Colloid and Polymer Science ( IF 2.4 ) Pub Date : 2021-09-11 , DOI: 10.1007/s00396-021-04888-5
Nashwan Q. Mahmood 1, 2 , Kálmán Marossy 1, 3 , Peter Baumli 4
Affiliation  

In this research, the effect of calcium oxide (CaO) nanocrystalline particles filled ethylene propylene diene monomer (EPDM) rubber composites is investigated, at different weight percentages (1.0, 2.0, 4.0, and 8 wt%) of CaO nanocrystalline particles using two methods of mixing. In one case conventional mixing on twin roll-mill was used, in the other case ultrasonic mixing as a pre-mixing was applied. CaO particles are synthesized by the precipitation method. The average crystallite size of CaO is 100 ± 20 nm. Adding CaO nanocrystalline particles increases the thermal stability of EPDM and the glass transition temperature. The hardness of EPDM rubber gradually increases with increasing the amount of CaO particles, the maximum hardness 64.2 observed in 8 wt% of CaO particles for both cases almost 26% higher than neat EPDM. Tensile strength decreases, while the maximum % modulus of the ultrasonic mixed sample was 1.48 MPa which is 24% higher than EPDM.



中文翻译:

纳米晶氧化钙颗粒对三元乙丙橡胶机械、热、电性能的影响

在本研究中,使用两种方法研究了氧化钙 (CaO) 纳米晶颗粒填充三元乙丙橡胶 (EPDM) 橡胶复合材料的影响,不同重量百分比(1.0、2.0、4.0 和 8 wt%)的 CaO 纳米晶颗粒的混合。在一种情况下使用双辊磨机上的常规混合,在另一种情况下应用超声波混合作为预混合。CaO颗粒通过沉淀法合成。CaO 的平均晶粒尺寸为 100 ± 20 nm。添加CaO纳米晶颗粒提高了EPDM的热稳定性和玻璃化转变温度。EPDM 橡胶的硬度随着 CaO 颗粒量的增加而逐渐增加,在两种情况下,在 8 wt% 的 CaO 颗粒中观察到的最大硬度为 64.2,几乎比纯 EPDM 高 26%。

更新日期:2021-09-13
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