Interfacially modified LDPE/GTR composites with non-polar elastomers: From microstructure to macro-behavior

Krzysztof Formela; Jerzy Korol; Mohammad Saeb

doi:10.1016/j.polymertesting.2015.01.003

Interfacially modified LDPE/GTR composites with non-polar elastomers: From microstructure to macro-behavior

Abstract

This paper provides some new insights into the mechanism of interaction and modifications in thermoplastic composites based on low density polyethylene (LDPE), ground tire rubber (GTR) and non-polar elastomer. The composites were prepared using a co-rotating twin-screw extruder at variable LDPE/GTR ratio and constant elastomer content. Two types of commercial elastomer were applied: styrene-butadiene-styrene (SBS) block copolymers (Kraton®) with different topologies (linear/branched) and partially cross-linked butyl rubbers (Kalar®) with different Mooney viscosities. Processing characteristics, static mechanical properties (tensile strength, elongation at break, hardness), dynamic mechanical properties, thermal properties and morphology of the resulting thermoplastic composites were investigated. Microstructure analysis shows that modification of LDPE/GTR composites with non-polar elastomers caused encapsulation of GTR particles within the elastomer phase. This phenomenon has significant influence on macro-behavior of thermoplastic composites based on LDPE/GTR blends. The results indicate that SBS copolymer improves interfacial interactions between GTR and LDPE, which enhances mechanical and thermal properties of the composites. On the other hand, cross-linked butyl rubber showed partial compatibility with LDPE and low compatibility with GTR particles.

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Authors (3)

Krzysztof Formela dr inż.
Jerzy Korol
- Department of Material Engineering Central Mining Institute
Mohammad Saeb
- Institute for Color Science and Technology, Iran Department of Resin and Additives

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Category:: Articles
Type:: artykuł w czasopiśmie wyróżnionym w JCR
Published in:: POLYMER TESTING no. 42, pages 89 - 98,
ISSN: 0142-9418
Language:: English
Publication year:: 2015
Bibliographic description:: Formela K., Korol J., Saeb M.: Interfacially modified LDPE/GTR composites with non-polar elastomers: From microstructure to macro-behavior// POLYMER TESTING. -Vol. 42, (2015), s.89-98
DOI:: Digital Object Identifier (open in new tab) 10.1016/j.polymertesting.2015.01.003
Verified by:: Gdańsk University of Technology