Investigations of polyethylene of raised temperature resistance service performance using autoclave test under sour medium conditions

e-Polymers

Yan Hongxia¹  Ding Han¹  Qi Guoquan¹  Li Houbu²  Qi Dongtao²  Kong Lushi² 

[1] School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710129, China;State Key Laboratory of Performance and Structural Safety for Petroleum Tubular Goods and Equipment Materials, CNPC Tubular Goods Research Institute, Xi’an 710077, China;

关键词: plastic;    stress;    chain;    degradation;    swelling;   

DOI  :  10.1515/epoly-2021-0029

来源: DOAJ

【 摘 要 】

The chapter deals with the performance evaluation of the polyethylene of raised temperature resistance (PE-RT) and polyethylene (PE) using autoclave test under sour oil and gas medium conditions. The analyses of performance changes showed that PE-RT has good media resistance at 60°C. As the temperature increases, its mechanical properties decrease, accompanied by an increase in weight. Comparative analyses showed that no matter what temperature conditions are, PE-RT media resistance is better than PE80. The better media resistance of PE-RT depends on its higher degree of branching. Short branches are distributed between the crystals to form a connection between the crystals, thereby improving its heat resistance and stress under high-temperature conditions. PE-RT forms an excellent three-dimensional network structure through copolymerization, ensuring that it has better media resistance than PE80. However, the mechanical performance will be attenuated due to the high service temperature.

【 授权许可】

Unknown