Synthesis of HDPE-b-iPP Diblock Copolymers via Subsequent Coordintive Chain-Transfer Polymerization and Their Use as Compatibilizers for HDPE/iPP Blends

DOI zum Zitieren der Version auf EPub Bayreuth: https://doi.org/10.15495/EPub_UBT_00009017
URN to cite this document: urn:nbn:de:bvb:703-epub-9017-0

Title data

Dickert, André ; Wolff, Patrick ; Kretschmer, Winfried ; Kempe, Rhett:
Synthesis of HDPE-b-iPP Diblock Copolymers via Subsequent Coordintive Chain-Transfer Polymerization and Their Use as Compatibilizers for HDPE/iPP Blends.
In: Journal of Polymer Science. Vol. 63 (2025) Issue 21 . - pp. 4525-4536.
ISSN 2642-4169
DOI der Verlagsversion: https://doi.org/10.1002/pol.20250151

	Format: PDF Name: Journal of Polymer Science - 2025 - Dickert - Synthesis of HDPE‐b‐ iPP Diblock Copolymers via Subsequent Coordintive.pdf Version: Published Version Available under License Creative Commons BY 4.0: Attribution
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Abstract

An envisioned circular economy of commonly used polymers, high-density polyethylene (HDPE) and isotactic polypropylene (iPP), is challenging due to their immiscibility with almost all other plastics. Therefore, highly effective compatibilizers and synthetic protocols permitting their large-scale production are highly desirable. Herein, we report the efficient one-pot synthesis of strictly linear HDPE-b-iPP diblock copolymers achieved by coordinative chain transfer polymerization (CCTP). Various diblock copolymers with short and very narrow distributed HDPE (M n  = 1400–2400 g × mol−1; Ð = 1.4) and long iPP segments were synthesized and used to compatibilize HDPE/iPP blends. The synthesized block copolymers differ in their overall molecular weights (M n  = 10,600–60,600 g × mol−1) by varying the iPP segment, whereas the HDPE block was kept in a narrow range. Block copolymers with a molecular weight from M n  = 23,000–39,000 g × mol−1 are competitive or outperform commercial compatibilizers, INFUSETM and INTUNETM, with the highest efficiency in compatibilizing 30/70 (wt./wt.) HDPE/iPP blends by a 5 wt.-% copolymer addition. SEM studies revealed that after adding the diblock copolymer, HDPE core shell structures were formed, and the HDPE particle size decreases compared to the neat blend, avoiding HDPE particles from debonding during tensile deformation tests.

Further data

Item Type:	Article in a journal
Keywords:	block copolymers; CCTP; circular polyolefins; compatibilizer; polymer blends
DDC Subjects:	500 Science > 540 Chemistry
Institutions of the University:	Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II > Chair Inorganic Chemistry II - Univ.-Prof. Dr. Rhett Kempe Faculties Faculties > Faculty of Biology, Chemistry and Earth Sciences Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry II
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-9017-0
Date Deposited:	24 Mar 2026 13:17
Last Modified:	24 Mar 2026 13:18
URI:	https://epub.uni-bayreuth.de/id/eprint/9017

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