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Effects of electron beam irradiation on properties of corn starch undergone periodate oxidation mechanism blended with polyvinyl alcohol

B., Soo Tueen and Lee, Tin Sin and Ratnam, C. T. and Yap, Bee Fen and Rahmat, A. R. (2018) Effects of electron beam irradiation on properties of corn starch undergone periodate oxidation mechanism blended with polyvinyl alcohol. Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 416 . pp. 73-88. ISSN 0168-583X

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Official URL: http://dx.doi.org/10.1016/j.nimb.2017.12.014

Abstract

This work was performed to examine the properties of pristine PVOH and PVOH-starch blends under exposure of different irradiation dosages. The periodate oxidation method was used to produce dialdehyde starch. The application of low dosages of electron beam irradiation (=10 kGy) has improved the tensile strength by forming crosslinking networks. However, the tensile strength drastically declined when radiated at 30 kGy due to the reduction of available hydroxyl groups inside polymer matrix for intermolecular interaction. Also, the incorporation of corn starch and dialdehyde starch has significantly reduced the melting temperature and enthalpy of melting of PVOH blends due to cessation of the hydrogen bonding between PVOH and starch molecules. The crystallite size for deflection planes (1 0 1), (1 0 1) and (2 0 0) for all PVOH blends was significant reduced when irradiated. The electron beam irradiation has also weakened the hydrophilic characteristic of all PVOH blends as evidenced in infrared and microscopy analysis.

Item Type:Article
Uncontrolled Keywords:electron beam irradiation, mechanical properties, polyvinyl alcohol
Subjects:T Technology > TP Chemical technology
Divisions:Chemical and Energy Engineering
ID Code:83974
Deposited By: Narimah Nawil
Deposited On:31 Oct 2019 18:10
Last Modified:05 Nov 2019 12:33

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