材料科学
固化(化学)
复合材料
丁苯橡胶
压缩永久变形
天然橡胶
复合数
韧性
极限抗拉强度
流变仪
聚合物
苯乙烯
共聚物
作者
Sajad Rasouli,Amirreza Zabihi,Mohammad Fasihi,Gholamreza Bozorg Panah Kharat
出处
期刊:ACS omega
[American Chemical Society]
日期:2023-08-29
卷期号:8 (36): 32701-32711
被引量:2
标识
DOI:10.1021/acsomega.3c03548
摘要
The effect of silicon nitride (Si3N4) as a thermally conductive material on the mechanical, microstructural, and physical properties as well as kinetics of the curing reaction of styrene-butadiene rubber/butadiene rubber (SBR/BR) was investigated in this work. The results showed an improvement in tensile, hardness, and compression features of the composite due to the presence of Si3N4. The properties were enhanced with the filler loading content; somehow, the composite including Si3N4 = 6 parts per hundred (phr) had the most significant performance, an increase of ∼15 and 20% in the maximum strain and toughness of the composite, respectively, an increase of almost 7% in the hardness, and an ∼13% reduction in the compression set. Also, the filler led to an increase in the crosslink density (calculated via the Flory-Rehner equation using swelling test) by 7.12 × 10-5 mol/g, proving the increment of the covalent bonds between the polymer chains during the curing reaction. The kinetic consideration revealed a reduction in the scorch and optimum curing times by ∼40 and ∼25%, respectively. In order to describe the kinetics of curing reaction of SBR/BR-Si3N4, an autocatalytic model based on the Kamal-Sourour model was applied on the rheometry results. The calculated kinetic parameters indicated that the thermally conductive Si3N4 accelerated the curing reaction by ∼40%, particularly at Si3N4 = 6 phr. After 6 phr of Si3N4, agglomeration of the filler particles decreased its performance.
科研通智能强力驱动
Strongly Powered by AbleSci AI