当前位置: X-MOL 学术J. Polym. Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Microstructural interpretations on thermo-mechanical relaxation and electrical conductivity of polyamide-12/polypropylene-MWCNT nanocomposites
Journal of Polymer Research ( IF 2.8 ) Pub Date : 2020-03-07 , DOI: 10.1007/s10965-020-02045-0
Sucharita Sethy , Bhabani K. Satapathy

Ternary-nanocomposites of polyamide 12 (PA-12) and multi-walled carbon nanotubes-embedded-polypropylene (MWCNT-embedded-PP) were fabricated by direct-melt-mixing-route and characterized for their dispersion-nanomorphology and phase-selective micromorphology. The crystallite sizes remained in the range of 8–9 nm and a broadening in loss-tangent peaks shifting towards higher temperatures with MWCNT was observed. The DC electrical conductivity remained dependent on the change in morphology from domain-dispersed (MWCNT-embedded-PP dispersed in PA-12 matrix) in PA-12/PP-MWCNT (70:30) to quasi-co-continuous (MWCNT-embedded-PP forming elongated domains of PP-MWCNT dispersed in PA-12 matrix tending to be near-continuous) in PA-12/PP-MWCNT (60:40). The conceptual feasibility of designing nanocomposites wherein the switch-over in solid-state relaxation behaviour vis-a-vis electrical conductivity is thus found to be controlled by morphology that ensures phase-selective conductive response for functional applications, as in flexible electronics, unlike the ones with rigid and high melting (thermally stiff) polyamides such as polyamide 6 or polyamide 66.



中文翻译:

聚酰胺12 /聚丙烯-MWCNT纳米复合材料的热机械松弛和电导率的微观结构解释

通过直接熔融混合法制备了聚酰胺12(PA-12)和多壁碳纳米管-嵌入聚丙烯(MWCNT-embedded-PP)的三元纳米复合材料,并对其分散-纳米形态和相选择微观形态进行了表征。 。微晶尺寸保持在8–9 nm范围内,并且观察到MWCNT的损耗角正切峰向更高的温度变宽。DC电导率仍然取决于形态的变化,从PA-12 / PP-MWCNT(70:30)中的畴分散(MWCNT嵌入的PP分散在PA-12基质中)到准准分子在PA-12 / PP-MWCNT中(60:40)的-co-连续(分散在PA-12基质中的PP-MWCNT的MWCNT嵌入PP形成的伸长域趋于接近连续)(60:40)。设计纳米复合材料的概念可行性,因此发现固态弛豫行为相对于电导率的转换受形态学控制,该形态学确保了功能性应用的相选择导电响应,例如在柔性电子学中,这与柔性电子学不同。含有硬质和高熔点(热硬性)聚酰胺的聚酰胺,例如聚酰胺6或聚酰胺66。

更新日期:2020-03-07
down
wechat
bug