LCB Polypropylene Cable Insulation

A polypropylene insulation that introduces long-chain branching and a rubber phase via in-situ copolymerization, simultaneously reducing modulus and increasing breakdown strength.

Zhuobin, Xi · Haoran, Sui · Yawei, Qin · Bingbing, Zhou · Bin, Li · Yin, Guilai · Li, Jianying · Huan, Li · Wu, Kangning

ACS Applied Polymer Materials 2026

Specifications

Increase in elongation at break

{'zh': '100', 'en': '100'} %

Decrease in elastic modulus

{'zh': '50', 'en': '50'} %

Increase in threshold field strength

{'zh': '49.2', 'en': '49.2'} %

Increase in breakdown field strength

{'zh': '18.65', 'en': '18.65'} %

Advantages

Elongation doubled

The rubber phase and flexible ethylene chains contribute to ~100% increase in elongation at break, enhancing flexibility.

Higher breakdown

Deep-level traps increase carrier capture probability and suppress carrier migration, resulting in 18.65% increase in breakdown field strength.

Modulus halved

Long-chain branching and comonomers lead to ~50% decrease in elastic modulus, making the material softer.

Higher threshold field

Threshold field strength increases by 49.2%, suppressing carrier migration and improving insulation reliability.

Applications

• High-voltage cable insulation：Replace crosslinked polyethylene with recyclable high-voltage-resistant polypropylene copolymer.
• Power equipment insulation：High breakdown strength and low dielectric loss suit insulation parts of power equipment.
• Eco-friendly cable materials：Polypropylene-based material contains no crosslinking agents and is easily recyclable.
• Recyclable insulation materials：Thermoplastic polypropylene copolymer can be melt-reprocessed for recycling.