Abstract
To investigate the role of electron beam (EB) irradiation as a physical aid in carboxymethylated (CM) starch, it was prepared to employ EB pretreatment, and then it was compounded with PVA and gliadin to prepare ternary plastics. EB irradiation significantly increased the degree of substitution of CM starch (0.086–0.173) and lowered its amylose content. As a result, the CM and EB starch had lower amylose content, molecular weight and more short chains. Moreover, the ternary plastics prepared by EB-CM starch improved the transparency, water contact angle (63.70–69.31°) and elongation at break (127.50–261.48%) of CM starch ternary plastics, and reduced the water vapor permeability (15.51–21.28 ×10−7 g/m·h·Pa) and tensile strength (8.05–11.43 MPa) of multielement plastics. It suggested that EB improved the mechanical and hydrophobic properties of CM ternary plastics. This work could provide new ideas for EB pretreatment-assisted chemical modification and broaden the development and application of EB-treated starch in multielement plastics.
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