Crystallographic Form and Non-isothermal Crystallization Kinetics of Multiwalled Carbon Nanotube/Polypropylene Composites

Yan-zhou LEI; Biao LI; Qin-niu LÜ; Shao-wei WANG; Zhen-zhong LI

doi:10.14028/j.cnki.1003-3726.2018.01.005

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Crystallographic Form and Non-isothermal Crystallization Kinetics of Multiwalled Carbon Nanotube/Polypropylene Composites

更新时间：2022-09-05

- Crystallographic Form and Non-isothermal Crystallization Kinetics of Multiwalled Carbon Nanotube/Polypropylene Composites
- Polymer Bulletin Vol. 31, Issue 1, Pages: 46-52(2018)
- 作者机构：
  
  太原工业学院　材料工程系，太原　030008
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2018.01.005
  CLC：
- Published：20 January 2018，
  
  Received：24 March 2017，
  
  Revised：08 November 2017，
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Yan-zhou LEI, Biao LI, Qin-niu LÜ, Shao-wei WANG, Zhen-zhong LI. Crystallographic Form and Non-isothermal Crystallization Kinetics of Multiwalled Carbon Nanotube/Polypropylene Composites. [J]. Polymer Bulletin 31(1):46-52(2018)
DOI：

Yan-zhou LEI, Biao LI, Qin-niu LÜ, Shao-wei WANG, Zhen-zhong LI. Crystallographic Form and Non-isothermal Crystallization Kinetics of Multiwalled Carbon Nanotube/Polypropylene Composites. [J]. Polymer Bulletin 31(1):46-52(2018) DOI： 10.14028/j.cnki.1003-3726.2018.01.005.

摘要

采用熔融共混法制备了多壁碳纳米管/聚丙烯(MWNT/PP)复合材料，利用X射线衍射法(XRD)、差示扫描量热法(DSC)分别研究了纯聚丙烯(PP)及MWNT/PP复合材料的晶型和非等温结晶动力学行为，并运用 Mo法研究了纯PP及MWNT/PP复合材料的非等温结晶动力学行为。结果表明，多壁碳纳米管(MWNT)的加入使PP发牛了由β晶型向α晶型的转变。MWNT在结晶过程中具有异相成核效应，提高了 PP的结晶温度和结晶速率。MWNT/PP复合材料的结晶活化能均明显高于纯PP。MWNT的加入使PP在单位时间内达到一定结晶度所需的降温速率减小。

Abstract

Multiwalled carbon nanotube/polypropylene (MWNT/PP) composites were prepared by melt blending. The crystallographic form and non-isothermal crystallization kinetics of polypropylene (PP) and MWNT/PP composites were investigated by X-ray diffraction (XRD) and differential scanning calorimetry (DSC). Mo equation was used to indicate the kinetics of non-isothermal crystallization of PP and MWNT/PP composites. The results show that

the addition of multiwalled carbon nanotube (MWNT) leads to the transition of PP from β crystallographic form to a crystallographic form. MWNT has an obvious nucleating effect on the crystallization of PP

increasing crystallization temperature and crystallization rate. On the contrary

the activation energies of MWNT/PP composites are higher than that of pure PP. MWNT can decrease the cooling rates of PP needed to reach relative crystallinities in a unite time.

关键词

熔融共混聚丙烯多壁碳纳米管晶型非等温结晶动力学

Keywords

Melt blendingMultiwalled carbon nanotubePolypropyleneCrystallographic formNon-isothermal crystallization kinetics

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