Morphological Structure of Crystalline Polymer Blend Involving Hydrogen Bonding: Polycaprolactone/Poly(4-vinylphenol) System
Morphological Structure of Crystalline Polymer Blend Involving Hydrogen Bonding: Polycaprolactone/Poly(4-vinylphenol) System
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DOI：
10.1021/ma9811019
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发表时间：
1998-11
期刊：
影响因子：
5.5
通讯作者：
Hsin‐Lung Chen;Shi-Fang Wang;Tsang-Lang Lin
中科院分区：
文献类型：
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作者：
Hsin‐Lung Chen;Shi-Fang Wang;Tsang-Lang Lin
通过考虑聚己内酯（PCL）/聚（4-乙烯基苯酚）（PVPh）系统，评估了晶体生长速率在强相互作用结晶/非晶聚合物共混物形态形成中的重要性。通过小角 X 射线散射 (SAXS) 研究了组成和分子量 (MW) 对形态结构的影响。与 PVPh 共混增加了与交替结晶-非晶层相关的长周期。长周期增加的特点是混合时 PCL 晶体增厚，而不是非晶层膨胀。 PVPh 的层外偏析程度由层状堆叠的体积分数揭示。尽管 PVPh 的 Tg 相对较高，但仍观察到 PVPh 的显着层外偏析。对于给定分子量的 PCL 和 PVPh 组合，层外偏析程度随着 PVPh 组成的增加而增加。对于给定的组合物，PCL 分子量 (MPCL) 为 15 80 的共混物...
The importance of crystal growth rate in the morphological formation of strongly interacting crystalline/amorphous polymer blends has been assessed by considering polycaprolactone (PCL)/poly(4-vinylphenol) (PVPh) systems. The effects of composition and molecular weight (MW) on the morphological structure were investigated by small-angle X-ray scattering (SAXS). Blending with PVPh increased the long period associated with the alternating crystalline−amorphous layers. The long period increase was characterized by the thickening of PCL crystals upon blending instead of the swelling of amorphous layers. The extent of extralamellar segregation of PVPh was revealed from the volume fraction of lamellar stacks. Despite the relatively high Tg of PVPh, significant extralamellar segregation of PVPh was observed. The extent of extralamellar segregation increased with PVPh composition for a given molecular weight combination of PCL and PVPh. For a given composition, the blends with PCL molecular weight (MPCL) of 15 80...