Preparation of Self-limiting Heating Cables with Excellent Processability, Mechanical Properties and PTC Effect <italic style="font-style: italic">via</italic> Thermal and Electrical Treatments

Tian-Hao Yang; Tong Wu; Qiang Fu

doi:10.1007/s10118-024-3074-z

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Preparation of Self-limiting Heating Cables with Excellent Processability, Mechanical Properties and PTC Effect via Thermal and Electrical Treatments

RESEARCH ARTICLE | Updated：2024-03-14

- Preparation of Self-limiting Heating Cables with Excellent Processability, Mechanical Properties and PTC Effect via Thermal and Electrical Treatments
- Chinese Journal of Polymer Science Vol. 42, Issue 4, Pages: 511-520(2024)
- Affiliations：
  
  a.State Key Laboratory of Polymer Materials Engineering, College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China
  b.State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
- Author bio：
  
  wutong@scu.edu.cn (T.W.)
  qiangfu@scu.edu.cn (Q.F.)
- Funds：
- DOI：10.1007/s10118-024-3074-z
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Yang, T. H.; Wu, T.; Fu, Q. Preparation of self-limiting heating cables with excellent processability, mechanical properties and PTC effect via thermal and electrical treatments. Chinese J. Polym. Sci. 2024, 42, 511–520

Tian-Hao Yang, Tong Wu, Qiang Fu. Preparation of Self-limiting Heating Cables with Excellent Processability, Mechanical Properties and PTC Effect via Thermal and Electrical Treatments. [J]. Chinese Journal of Polymer Science 42(4):511-520(2024)
Yang, T. H.; Wu, T.; Fu, Q. Preparation of self-limiting heating cables with excellent processability, mechanical properties and PTC effect via thermal and electrical treatments. Chinese J. Polym. Sci. 2024, 42, 511–520 DOI： 10.1007/s10118-024-3074-z.

Tian-Hao Yang, Tong Wu, Qiang Fu. Preparation of Self-limiting Heating Cables with Excellent Processability, Mechanical Properties and PTC Effect via Thermal and Electrical Treatments. [J]. Chinese Journal of Polymer Science 42(4):511-520(2024) DOI： 10.1007/s10118-024-3074-z.

摘要

The self-limiting heating cables with high intensity of PTC and mechanical properties are prepared through industrial production lines. By using the structuring processing methods of heat treatment and electrical treatment

the carbon black in PE matrix is uniformly dispersed macroscopically but concentrated microscopically

which maximizes the efficiency of carbon black.

Abstract

Polymer/conductive filler composites have been widely used for the preparation of self-limiting heating cables with the positive temperature coefficient (PTC) effect. The control of conductive filler distribution and network in polymer matrix is the most critical for performance of PTC materials. In order to compensate for the destruction of the filler network structure caused by strong shearing during processing

an excessive conductive filler content is usually added into the polymer matrix

which in turn sacrifices its processability and mechanical properties. In this work

a facile post-treatment of the as-extruded cable

including thermal and electrical treatment to produce high-density polyethylene (HDPE)/carbon black (CB) cable with excellent PTC effect

is developed. It is found for the as-extruded sample

the strong shearing makes the CB particles disperse uniformly in HDPE matrix

and 25 wt% CB is needed for the formation of conductive paths. For the thermal-treated sample

a gradually aggregated CB filler structure is observed

which leads to the improvement of PTC effect and the notable reduction of CB content to 20 wt%. It is very interesting to see that for the sample with combined thermal and electrical treatment

CB particles are agglomerated and oriented along the electric field direction to create substantial conductive paths

which leads to a further decrease of CB content down to 15 wt%. In this way

self-limiting heating cables with excellent processability

mechanical properties and PTC effect have simultaneously been achieved.

关键词

Keywords

Self-limiting heating cablesPositive temperature coefficientThermal treatmentElectrical treatment

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Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science & Technology

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Preparation of Self-limiting Heating Cables with Excellent Processability, Mechanical Properties and PTC Effect via Thermal and Electrical Treatments

DOI：10.1007/s10118-024-3074-z

摘要

Abstract

关键词

Keywords

references