NDLI: Temperature and trap distribution dependence of electrical tree growth characteristics in polypropylene/elastomer blends for recyclable cable insulation

Content Provider	IET Digital Library
Author	Gao, Yuan Li, Jing Han, Tao Yuan, Yanqiu Huang, Shihao Liu, Yong Chao
Abstract	Polypropylene (PP)/elastomer blends as a promising cable insulation material have to face the challenge of electrical treeing which possibly leads to unexpected insulation failure. In this work, two types of elastomers, i.e. polyolefin elastomer and propylene-based elastomer, have been blended into isotactic PP. Effects of the elastomer content and type on electrical treeing behaviours have been investigated under different ambient temperatures. Isothermal surface potential decay measurement has been performed to explore the influence of trap distribution on the treeing behaviour, scanning electron microscope and differential scanning calorimetry measurements were performed to characterise the structure of blends. It was found that with the increase of elastomer content, the trap energy level was reduced and the shallow trap density was increased, which resulted in the enhancement of the tree growth rate and the decrease in the breakdown time. With the temperature changing from 20 to 100°C, the growth rate tended to be increased except that an anomalous reduction in the rate occurred at 80°C. It is suggested that the compatibility between PP matrix and elastomer plays an important role in determining the morphology of blends, which in turn influences the trap distribution and the temperature dependent treeing behaviours.
Starting Page	755
Ending Page	765
Page Count	11
ISSN	17518822
Volume Number	13
e-ISSN	17518830
Issue Number	Issue 5, Jul (2019)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/13/5
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2018.5382
Journal	IET Science, Measurement & Technology
Publisher Date	2019-03-14
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Ambient Temperatures Cable Insulation Material Differential Scanning Calorimetry Differential Scanning Calorimetry Measurement Elastomer Content Elastomers Electrical Tree Growth Characteristic Electrical Treeing Behaviours Filled Polymers Isothermal Surface Potential Decay Measurement Organic Insulating Material Plastics Polyethylene Insulation Polymer Blends Polyolefin Elastomer Polypropylene-elastomer Blends Preparation of Polymers And Plastics Propylene-based Elastomer Recyclable Cable Insulation Recycling Scanning Electron Microscopy Shallow Trap Density Solid Surface Structure Structure of Polymers Surface Potential Temperature 20.0 DegC to 100.0 DegC Temperature 80.0 DegC Temperature Dependent Treeing Trap Distribution Dependence Trap Energy Level Tree Growth Rate Treeing Behaviour Unexpected Insulation Failure
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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