Electrical, thermal, and mechanical properties of polypropylene/multiwalled carbon nanotube micromoldings

被引：7

作者：

Zhou, Shengtai ^{[1
]}

Hrymak, Andrew N. ^{[2
]}

Kamal, Musa R. ^{[3
]}

机构：

[1] Sichuan Univ, Polymer Res Inst, State Key Lab Polymer Mat Engn, Chengdu, Sichuan, Peoples R China

[2] Univ Western Ontario, Dept Chem & Biochem Engn, London, ON N6A 5B9, Canada

[3] McGill Univ, Dept Chem Engn, Montreal, PQ, Canada

来源：

POLYMER COMPOSITES | 2020年 / 41卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

composites; injection molding; microstructure; INJECTION-MOLDING PARAMETERS; ISOTACTIC POLYPROPYLENE; COMPOSITES; NANOCOMPOSITES; CRYSTALLIZATION; MORPHOLOGY; SHEAR; NANOINDENTATION; MICROSTRUCTURE; DISPERSION;

D O I：

10.1002/pc.25474

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

In this paper, properties of microparts molded from polypropylene/multiwalled carbon nanotubes (PP/CNT) composites were studied in detail. Results indicated that the percolation threshold of PP/CNT microparts shifted to higher filler concentrations when compared with their compression molded counterparts. Morphology observations revealed that the distribution of CNT is not uniform along the flow direction, which can significantly affect the properties of microparts. The thermal properties of PP and PP/CNT composites as well as corresponding microparts were investigated using differential scanning calorimetry and thermogravimetric analysis, respectively. Moreover, the mechanical properties of microparts were evaluated by nanoindentation analysis. Multicycling measurements indicated that the mechanical properties of microparts are both depth and location dependent. Both the hardness and elastic modulus increased with corresponding filler loading concentration of CNT below 3 and 7 wt%, respectively. Above those concentrations, both properties decreased with an increase of CNT concentration. This could be related to the state of filler distribution within the microparts.

引用

页码：1507 / 1520

页数：14

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