Evaluation of the Aging Behavior of High Density Polyethylene in Thermal Oxidative Environment by Principal Component Analysis

Abstract:

To evaluate the aging behavior of high density polyethylene (HDPE) under an artificial accelerated environment, principal component analysis (PCA) was used to establish a non-dimensional expression Z from a data set of multiple degradation parameters of HDPE. In this study, HDPE samples were exposed to the accelerated thermal oxidative environment for different time intervals up to 64 days. The results showed that the combined evaluating parameter Z was characterized by three-stage changes. The combined evaluating parameter Z increased quickly in the first 16 days of exposure and then leveled off. After 40 days, it began to increase again. Among the 10 degradation parameters, branching degree, carbonyl index and hydroxyl index are strongly associated. The tensile modulus is highly correlated with the impact strength. The tensile strength, tensile modulus and impact strength are negatively correlated with the crystallinity.

• Periodical: Key Engineering Materials (Volume 727)
• Pages: 447-449
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.727.447
• Online since: January 2017
• Authors: Jun Dai*, Hua Yan, Jian Jian Yang, Jun Jun Guo
• Keywords: High Density Polyethylene (HDPE), Polymer, Principal Component Analysis (PCA), Thermal Oxidation

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