Relationship between Morphology of Microphase-Separated Structure and Phase Restructuring at the Surface of Poly[2-hydroxyethyl methacrylate-block-4-(7‘-octenyl)styrene] Diblock Copolymers Corresponding to Environmental Change
Relationship between Morphology of Microphase-Separated Structure and Phase Restructuring at the Surface of Poly[2-hydroxyethyl methacrylate-block-4-(7‘-octenyl)styrene] Diblock Copolymers Corresponding to Environmental Change
复制标题
聚[甲基丙烯酸2-羟乙酯-嵌段-4-(7-辛烯基)苯乙烯]二嵌段共聚物表面微相分离结构形貌与环境变化对应的相重构关系
DOI：
10.1021/la9808162
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Nakahama
中科院分区：
文献类型：
--
作者：
K. Senshu;M. Kobayashi;Noriko Ikawa;S. Yamashita;A. Hirao;S. Nakahama
通过阴离子活性聚合合成了由甲基丙烯酸 2-羟乙酯 (HEMA) 和 4-(7'-辛烯基)苯乙烯组成的亲水-疏水二嵌段共聚物，分别含有 26、47 和 82 wt% 的聚[4-(7'-辛烯基)苯乙烯]、HO-30、-50 和 -80。通过接触角测量、透射电子显微镜 (TEM) 观察和 X 射线光电子能谱 (XPS) 测量分析了干湿条件下溶剂浇铸薄膜的表面结构。 HO-30 和 HO-50 的分析结果证实了表面重组对环境变化的响应。当薄膜浸泡在水中时，观察到表面非常快速的水合。然而，即使在空气中退火，表面的脱水也会缓慢发生。通过 OsO4 染色技术并在疏水链段中引入碳碳双键，成功进行了 TEM 观察。薄膜表面附近的横截面 TEM 图像表明......
Hydrophilic−hydrophobic diblock copolymers composed of 2-hydroxyethyl methacrylate (HEMA) and 4-(7‘-octenyl)styrene with 26, 47, and 82 wt % of poly[4-(7‘-octenyl)styrene], HO-30, -50, and -80, respectively, were synthesized by anionic living polymerization. The surface structures of their solvent-cast films under dry and wet conditions were analyzed by contact angle measurements, transmission electron microscopic (TEM) observation, and X-ray photoelectron spectroscopic (XPS) measurements. The analytical results of HO-30 and HO-50 substantiate surface restructuring in response to environmental change. When the films were soaked in water, very quick hydration of the surface was observed. However, dehydration of the surface occurred slowly even by annealing in air. TEM observation was successfully performed by staining technique with OsO4 and introduction of a carbon−carbon double bond in the hydrophobic segment. Cross sectional TEM images of near film surfaces suggested that the phase restructuring at the ...