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The effect of moisture content and composition on tensile properties of the synthetic polymer/starch composition

机译:水分含量和组成对合成聚合物/淀粉组合物拉伸性能的影响

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摘要

Systems consisted of polyethylene-ethylene/acrylic acid co-polyme-starch differing in starch content (20-47 wt.%) were prepared by extrusion.The curves describing time dependence of water absorption have been determined gravimetrically.It has been found that investigated compositions absorbed water in amount proportional to starch content.Tensile properties of the compositions depended on starch content as well as on absorbed water content.Water content (W_t) increase caused decrease in breaking stress (sigma_(max_) and linear increase in breaking strain values (epsilon_(max)).Elasticity modulus (E) values decreased linearly with W_t value increasing,to the boundary value W_m since with E became constant.
机译:通过挤出制备淀粉含量不同(20-47 wt。%)的聚乙烯-乙烯/丙烯酸共聚淀粉体系,并用重量法测定了描述吸水时间依赖性的曲线。组合物吸收的水量与淀粉含量成正比。组合物的拉伸性能取决于淀粉含量以及吸收的水含量。水含量(W_t)的增加导致断裂应力的降低(sigma_(max_)和断裂应变值的线性增加(ε_(max))。随着W_t值的增加,弹性模量(E)值线性减小,直到E变为常数,边界值W_m减小。

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