Solidification behavior of high-density polyethylene (HDPE) during injection molding: Correlation between crystallization kinetics and thermal gradient field

2015 Global Conference on Polymer and Composite Materials

材料科学;化学

Yang, Bin^1 ; Deng, Yan-Li^1 ; Li, Gui-Jing^1,2 ; Miao, Ji-Bin^1 ; Xia, Ru^1 ; Qian, Jia-Sheng^1 ; Chen, Peng^1 ; Liu, Jing-Wang^3

College of Chemistry and Chemical Engineering, Key Laboratory of Environment-Friendly Polymeric Materials of Anhui Province, Anhui University, Hefei

230601, China^1

Department of Materials Science and Engineering, Zhejiang University, Hangzhou

310058, China^2

College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu

610065, China^3

关键词: Crystallization rates;    High density polyethylene(HDPE);    Relative crystallinity;    Solidification behaviors;    Structure property;    Temperature decay;    Temperature differences;    Thermal conduction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/87/1/012020/pdf
DOI  :  10.1088/1757-899X/87/1/012020

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This work mainly investigated the effect of thermal field on the crystallization kinetics of high-density polyethylene (HDPE) during injection molding (IM) process. The thickness X = 0.4 was found to be a crucial location heavily influenced by thermal conduction. The temperature decay tended to be stable, with limited variation of the crystallization rate when X > 0.4. It was observed that the crystallization rate was in good proportion to the cooling rate (φ). Our experimental finding showed that the consequence of relative crystallinity (χ) was in agreement with that of the secondary temperature difference (STD). This study is practically significant to the further investigation on the relationship among "processing-structure-property" of polymeric materials.