Degradation of LDPE LLDPE and HOPE in film extrusion
(2004) 2004 TAPPI PLACE - Polymers, Laminations, Adhesives, Coatings, and Extrusions Division Conference p.77-92- Abstract
- The degradation of different polyethylenes, LDPE, LLDPE, and HDPE, with and without antioxidants and at different oxygen concentrations in the polymer granulates have been studied in extrusion coating processing. The degradation was followed by On Line Rheometry, Size Exclusion Chromatography, Surface Oxidation Index measurements, and GC-MS Chromatography. The degradations starts in the extruder where primary radicals are formed which are subject the auto oxidation when oxygen is present. In the extruder, cross-linking and chain scission reactions are dominating at low and high melt temperatures, respectively, for LDPE, and chain scission is over all dominating for the more linear LLDPE and HDPE resins. Additives such as antioxidants react... (More)
- The degradation of different polyethylenes, LDPE, LLDPE, and HDPE, with and without antioxidants and at different oxygen concentrations in the polymer granulates have been studied in extrusion coating processing. The degradation was followed by On Line Rheometry, Size Exclusion Chromatography, Surface Oxidation Index measurements, and GC-MS Chromatography. The degradations starts in the extruder where primary radicals are formed which are subject the auto oxidation when oxygen is present. In the extruder, cross-linking and chain scission reactions are dominating at low and high melt temperatures, respectively, for LDPE, and chain scission is over all dominating for the more linear LLDPE and HDPE resins. Additives such as antioxidants react with primary radicals formed in the melt. Degradation taking place in the film between the die orifice and the quenching point is mainly related to the exposure time to air-oxygen. Melt temperatures above 280 (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/614991
- author
- Andersson, Thorbjörn and Wesslén, Bengt LU
- organization
- publishing date
- 2004
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Rheometry, Oxygen concentrations, Surface oxidation, Film extraction
- host publication
- TAPPI PLACE Conference
- pages
- 77 - 92
- publisher
- Technical Assoc. of the Pulp and Paper Industry Press
- conference name
- 2004 TAPPI PLACE - Polymers, Laminations, Adhesives, Coatings, and Extrusions Division Conference
- conference location
- Indianapolis, IN, United States
- conference dates
- 2004-08-29 - 2004-09-02
- external identifiers
-
- scopus:22144468430
- ISBN
- 1595100628
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)
- id
- 2d76ab23-b1e6-4be6-bee0-231d73d3ad27 (old id 614991)
- date added to LUP
- 2016-04-04 11:41:16
- date last changed
- 2022-01-29 22:14:57
@inproceedings{2d76ab23-b1e6-4be6-bee0-231d73d3ad27, abstract = {{The degradation of different polyethylenes, LDPE, LLDPE, and HDPE, with and without antioxidants and at different oxygen concentrations in the polymer granulates have been studied in extrusion coating processing. The degradation was followed by On Line Rheometry, Size Exclusion Chromatography, Surface Oxidation Index measurements, and GC-MS Chromatography. The degradations starts in the extruder where primary radicals are formed which are subject the auto oxidation when oxygen is present. In the extruder, cross-linking and chain scission reactions are dominating at low and high melt temperatures, respectively, for LDPE, and chain scission is over all dominating for the more linear LLDPE and HDPE resins. Additives such as antioxidants react with primary radicals formed in the melt. Degradation taking place in the film between the die orifice and the quenching point is mainly related to the exposure time to air-oxygen. Melt temperatures above 280}}, author = {{Andersson, Thorbjörn and Wesslén, Bengt}}, booktitle = {{TAPPI PLACE Conference}}, isbn = {{1595100628}}, keywords = {{Rheometry; Oxygen concentrations; Surface oxidation; Film extraction}}, language = {{eng}}, pages = {{77--92}}, publisher = {{Technical Assoc. of the Pulp and Paper Industry Press}}, title = {{Degradation of LDPE LLDPE and HOPE in film extrusion}}, year = {{2004}}, }