The distribution of degree of crystallinity-New concept in polymer science
Due to the structure characteristics of huge macromolecular size and the very low motion feature of the polymer chain which is very difficult to arrange regularly their long chain into the three dimensional space,thus the polymer will incompletely crystallize except for the macroscopic single crystal of polydiacetylene polymerized by means of solid state crystalline polymerization.Therefore,there is the concept of degree of crystallinity in polymer science which is defined by the weight fraction of crystal component in the entire polymer sample ”1,2”.In general,the degree of crystallinity in normal crystalline polymer is below 50%,even though the degree of crystallinity of high density polyethlene with the simplest structure is a little more than 90%.
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2019-04-10(万方平台首次上网日期,不代表论文的发表时间)
共2页
1711-1712