Improving electric thermal stability of polypropylene by chemically linking small amount of hindered phenol groups

Abstract

Thermal stability of polypropylene (PP) over a broad temperature is critical for many applications. Hindered phenol (HP) groups have been utilized in PP for thermal-oxidative protection. This paper studies thermal stability of the electret property of PP linked with 0.2 mol% HP. It is observed that small amount of chemically linked HP groups improves electret thermal stability as reflected by the higher peak temperature of the thermally stimulated discharge curve and about 65% increase in the trap level. In addition, the HP groups in PP generate “rigid backbones” which maintain the PP film shapes to temperatures near the melting (~ 150 °C), compared with pristine PP at 70 °C. Supplementary Information The online version of this article (10.1557/s43580-021-00016-1) contains supplementary material, which is available to authorized users.

Nickel(II)-Polysiloxane “Sandwiches” as Electrical Breakdown Protective Materials

“…Thus, PP and PDMS layers play a role of supporting layers, which protect the NiPyPDMS layer from the environment, dust, and temporary spreading. PDMS can be partially healed via EB compared to PP. , PP can produce more thermolysis products (in the form of semiconductive carbon black), whereas PDMS is more thermally stable (up to 340–400 °C). , All of these features make PDMS more competitive for application as possible protective layers in multilayered self-healing coatings on power lines.…”

“…30,31 PP can produce more thermolysis products (in the form of semiconductive carbon black), whereas PDMS is more thermally stable (up to 340−400 °C). 32,33 All of these features make PDMS more competitive for application as possible protective layers in multilayered self-healing coatings on power lines.…”