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Research on starch‐ g ‐polyvinyl acetate and epoxy resin‐modified corn starch adhesive
Author(s) -
Nie Yanan,
Tian Xiaocai,
Liu Yanchang,
Wu Kai,
Wang Jikui
Publication year - 2013
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22379
Subject(s) - polyvinyl acetate , starch , materials science , epoxy , adhesive , composite material , modified starch , shear strength (soil) , mass fraction , polyvinyl alcohol , polymer , organic chemistry , chemistry , environmental science , layer (electronics) , soil science , soil water
Abstract A new corn starch adhesive modified by starch‐ g ‐polyvinyl acetate (starch‐ g ‐PVAc) and epoxy resin is described in this study. Starch‐ g ‐PVAc is used as high cohesive energy component to improve the dry shear strength of the starch adhesive. Although the epoxy resin, which can easily crosslink with the oxidized starch, is used as water‐resistant component to improve the wet shear strength. Because there is no chemical reaction happening between polyvinyl acetate and epoxy resin, both the dry shear strength and the wet shear strength of the corn starch adhesive are notably increased. Considering all the related factors, the optimum of the modification is achieved when the dosage of starch‐ g ‐PVAc and epoxy resin is 70% of the oxidized starch latex with m (Ep): m (starch‐ g ‐PVAc) = 1:2. That is, the epoxy resin is 23% in mass fraction and starch‐ g ‐PVAc 47% in mass fraction. The dry shear strength is 4.50 MPa, and the wet shear strength is 2.51 MPa. The modified corn starch has a broad prospect in the application of plywood industry. POLYM. COMPOS., 2013. © 2012 Society of Plastics Engineers