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Rheological and molecular properties of organic peroxide induced long chain branching of recycled and virgin high density polyethylene resin

journal contribution
posted on 2024-11-01, 07:05 authored by Harisinh Parmar, Rahul Gupta, Satinath BhattacharyaSatinath Bhattacharya
Commercial blow molding grade recycled high density polyethylene (R-HDPE) and blow molding grade virgin high density polyethylene (V-HDPE) were reactively extruded with various compositions (0.00-0.15% wt/wt) of different peroxides in a twin screw extruder. The aim was to produce the extended chain mechanism of a blow molding grade HDPE photopolymer-a polymer resin comprising a significant part of the post consumer recycled plastic stream in Australia. In shear rheological tests, the modified material exhibited an increase in viscoelastic properties and complex viscosity compared to unmodified counterparts. Higher extent of viscoelastic properties enhancement was observed with 1, 3 1, 4 BIS (tert-butylperoxyisopropyl) Benzene (OP2). This could be attributed to the higher degree of branching. The weight average molecular weight of the all modified materials and its molecular weight distribution (MWD) widened with peroxide modification. These results also support that formation of branching dominates the modification process at molecular level. Increase in branching index (g) with increase in peroxide composition also confirmed higher degree of branching. © 2009 Society of Plastics Engineers.

History

Journal

Polymer Engineering and Science

Volume

49

Issue

9

Start page

1806

End page

1813

Total pages

8

Publisher

John Wiley & Sons, Inc.

Place published

United States

Language

English

Former Identifier

2006017718

Esploro creation date

2020-06-22

Fedora creation date

2010-11-19

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