Abstract: 2-dimethylaminoethyl starch (DMAES) was prepared via tertiary amination of starch with 2-dimethylaminoethyl chloride hydrochloride.And then blended with polyvinyl alcohol (PVA) in different proportions,the effect of blending on the mechanical properties of DMAES/PVA films was studied.The toughening effect of film was examined in terms of the tensile strength,breaking elongation,work-to-break,and bending endurance of film.The effect of the blending on the adhesion of cotton and polyester fibers was also considered.The results showed that the blending was able to improve the toughness of starch film and reduced its brittleness.With the increase in blending ratio of PVA,the viscosity of starch paste decreased while the breaking elongation,work-to-break and bending endurance increased.The adhesive strength to cotton fibers rose whereas the strength to polyester fibers were improved significantly.Under the ratio of DMAES∶PVA was 80∶20 (wt,mass fraction),the tensile strength of films were 23.10N/mm2.The breaking elongation and work-to-break were 10.70% and 130.80mJ respectively.Bending endurance was reached 4243 times (average),and the adhesive strength to polyester fiber and cotton fiber were 147.9Ft/N and 81.8Ft/N respectively.
张寻,Sarkodie Bismark,祝志峰. DMAES/PVA共混膜力学性能的研究[J]. 化工新型材料, 2018, 46(10): 83-86.
Zhang Xun,Sarkodie Bismark,Zhu Zhifeng. Study on mechanical property of DMAES/PVA blend film. New Chemical Materials, 2018, 46(10): 83-86.
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