Polyethylene pipe resins are widely used in gas or water transportation pipes

and slow crack growth (SCG) performance is an important index for evaluating the quality of resins

and it is also an important basis for accurately predicting the service lifetime of pipelines. This article summarizes the structural factors of polyethylene pipe resin

including the influence of molecular weight and its distribution

comonomer content and its distribution

number of tie molecules

and lamella thickness on the slow crack growth behavior. Generally

increasing the molecular weight and its distribution

and the comonomer content are all effective to improve the slow crack growth resistance. The number of tie molecules and the lamella thickness are affected by the molecular weight and its distribution

the comonomer content and its distribution. By summarizing the recent research progress

it tries to provide some suggestion to industry in improving the performance of slow crack growth resistance. It also looks forward to the future development trend of the research on the influence of structural factors on the slow crack growth of polyethylene pipes.