Effects of starch and pro-oxidant contents on properties of LDPE/ETHYLENE-DIENE copolymer blends

Name: Sunan Wichitkhachee

keyword: Ldpe

; Starch Bland

; Degradation

Abstract: The development of a polymer blend prepared from low density polyethylene (LDPE), ethylene–diene copolymer (E–DI) and cassava starch was investigated. E–DI was used to improve flexibility of the blends at a quantity of 50% by weight based on LDPE matrix. LDPE/E–DI/starch blends were prepared containing various starch contents 15, 30, 45, 60 and 75 phr. The use of coupling agent and processing aid was also necessary in the blend formulations. The specimens were prepared by means of a twin screw extruder, injection molding and sheet line extrusion. The influence of starch content on the mechanical properties was investigated. It was found that tensile strength of the LDPE/E–DI/starch films increased with increasing starch content which was due to an enhance in chain interaction between starch and LDPE facilitating by coupling agent. The blends were exposed to outdoor environment, thermal aging and soil burial environment. In order to evaluate the application of these blends as environmental friendly packaging materials, the changes in the mechanical, structural, morphological properties and molecule weight of the blends were determined using tensile tester, FT–IR, SEM and solution viscosity. The current study advocates that improvement in both mechanical and degradation properties of the starch based polymer blends can be achieved.

Burapha University. Library

Address: CHONBURI

Email: buulibrary@buu.ac.th

Name: Thanida Trakulsujaritchok

Role: Principal advisor

Created: 2012

Modified: 2565-08-03

Issued: 2017-11-29

วิทยานิพนธ์/Thesis

application/pdf

eng

DegreeName: Master of Science

Level: Master's Degree

Descipline: Polymer Science

Grantor: Burapha University

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