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24.12.2022 | Original Contribution

Morphology, rheological, thermal, and mechanical properties of high-density polyethylene toughened by propylene-ethylene random copolymers

verfasst von: Yi Li, Dongdong Li, Hongda Cheng, Yancun Yu, Ye Zhang, Hechang Shi, Changyu Han

Erschienen in: Colloid and Polymer Science | Ausgabe 2/2023

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Abstract

Propylene-ethylene random copolymer (PEC) elastomer was used to toughen high-density polyethylene (HDPE). The morphology, thermal behavior, rheological, and mechanical properties of HDPE/PEC blends were investigated. Scanning electron microscopy (SEM) results revealed that PEC-rich domains dispersed evenly in the HDPE matrix, and HDPE/PEC blends were immiscible. Rheological measurements indicated that the HDPE/PEC blends exhibited higher melt strength and viscosity than neat HDPE, which was beneficial to foaming and blow molding of HDPE. From the results of DSC, PEC elastomer inhibited the crystallization and reduced the degree of crystallinity of HDPE. It was noteworthy that the significant enhancement of the toughness of HDPE was obtained by adding PEC elastomer. The maximum elongation at break (684.6%) and impact strength (35.3 kJ m−2) were achieved for the HDPE/PEC blends, which increased by 110% and 240%, respectively, compared with neat HDPE. Therefore, PEC elastomer could be used as an effective impact modifier for HDPE.

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Metadaten
Titel
Morphology, rheological, thermal, and mechanical properties of high-density polyethylene toughened by propylene-ethylene random copolymers
verfasst von
Yi Li
Dongdong Li
Hongda Cheng
Yancun Yu
Ye Zhang
Hechang Shi
Changyu Han
Publikationsdatum
24.12.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
Colloid and Polymer Science / Ausgabe 2/2023
Print ISSN: 0303-402X
Elektronische ISSN: 1435-1536
DOI
https://doi.org/10.1007/s00396-022-05049-y

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