Work

Industrial Synthesis of Linear Low‐Density Polyethylene with H‐Shape Long‐Chain‐Branching Structures Using Ziegler‐Natta Catalysts

Year: 2024

Type: article

Abstract: A novel linear low‐density polyethylene containing H‐shape long‐chain‐branching structures (LCB‐LLDPE) is industrially synthesized with Ziegler‐Natta catalysts and gas‐phase polymerization process at the assistance of ω ‐alkenylmethyldichlorosilane copolymerization‐hydrolysis chemistry. The incorporated LCB structures are characterized by NMR, SEC, and SAOS (small amplitude oscillatory shear) measurements. With a same‐sourced plain LLDPE as a comparison benchmark, the new LCB‐LLDPE is studied for its properties on various aspects, revealing, among others, significantly reinforced rheological properties, including enhanced shear‐thinning behavior, a significant strain‐hardening phenomenon in extensional flow, and substantially increased melt strength, as well as significantly improved optical properties, which all benefit its application in extrusion blow molding for thin‐film production.

Source: Macromolecular Reaction Engineering

DOI: 10.1002/mren.202400044

Authors: Bingyu Zhang, Fengtao Chen, Jin‐Yong Dong

Institutions: Chinese Academy of Sciences, Institute of Chemistry, University of Chinese Academy of Sciences

Language: English

Topic: Polymer crystallization and properties

Subfield: Polymers and Plastics

Field: Materials Science

Domain: Physical Sciences

Open Access status: bronze

Funder: National Natural Science Foundation of China

Awards: G1139733828, G7951595421