Chain folding in semicrystalline oxyethylene/oxybutylene diblock copolymers
Chain folding in semicrystalline oxyethylene/oxybutylene diblock copolymers
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DOI：
10.1021/ma971158f
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发表时间：
1997-12-29
期刊：
影响因子：
5.5
通讯作者：
Booth, C
中科院分区：
文献类型：
--
作者：
Mai, SM;Fairclough, JPA;Booth, C
用同步小角X射线散射（SAXS）和广角X射线散射（WAXS）、低频拉曼光谱和差示扫描量热法研究了含一个可结晶E嵌段和一个不可结晶B嵌段的环氧乙烷/环氧丁烯（E/B）二嵌段共聚物的链折叠行为。两个模型，正常密度（ND）和晶体/液晶（CLC）模型被用来探索的结果，考虑到两个链的横截面积的差异，并需要在近似正常密度填充空间。结果表明，两种模型都能较好地描述较长共聚物的数据，但CLC模型更适合于较短共聚物的数据。
The chain folding behavior of oxyethylene/oxybutylene (E/B) diblock copolymers, with one crystallizable E block and one noncrystallizable B block, has been studied by simultaneous SAXS and WAXS, low-frequency Raman spectroscopy, and differential scanning calorimetry. Two models, normal density (ND) and crystal/liquid-crystal (CLC) models were used to explore the results, consideration being given to the difference in the cross-sectional area of the two chains and the need to fill space at approximately normal density. It was found that both models can describe the data for the longer copolymers, but the CLC model is better for the shorter copolymers.