Realizing 5.4 nm Full Pitch Lamellar Microdomains by a Solid-State Transformation
Realizing 5.4 nm Full Pitch Lamellar Microdomains by a Solid-State Transformation
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DOI：
10.1021/acs.macromol.7b01443
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发表时间：
2017-09-26
期刊：
影响因子：
5.5
通讯作者：
Russell, Thomas P.
中科院分区：
文献类型：
--
作者：
Jeong, Gajin;Yu, Duk Man;Russell, Thomas P.
开发了一种简单的方法。通过聚缩酮甲基丙烯酸酯-b-苯乙烯（PSM-b-PS）的酸水解，实现了全节距为5.4 nm的自组装嵌段共聚物（BCP）层状微域形态。酸水解将具有两个疏水嵌段的PSM-b-PS转化为具有一个亲水嵌段和一个疏水嵌段的聚(甘油单甲基丙烯酸酯-b-苯乙烯)(PGM-b-PS)。这种转变显着增加了链段相互作用参数，使得相混合的PSM-b-PS可以在固态下转变为微相分离的BCP，而无需使用任何添加剂。相混合状态下 PSM-b-PS 的相关空穴散射产生分段相互作用参数 (x)，由 x = 0.0196 + 4.694/T 给出，其中 T 是绝对温度。利用本研究中使用的对称 BCP，通过小角 X 射线散射 (SAXS) 确定了有序层状微域间距，作为聚合度的函数 (16
A simple method was developed to. realize a self-assembled block copolymer (BCP) lamellar microdomain morphology with a full pitch of 5.4 nm through an acid hydrolysis of poly(solketal methacrylate-b-styrene) (PSM-b-PS). The acid hydrolysis transforms PSM-b-PS, having two hydrophobic blocks, into poly(glycerol monomethacrylate-b-styrene) (PGM-b-PS), having one hydrophilic and one hydrophobic block. This transformation markedly increases the segmental interaction parameter such that a phase-mixed PSM-b-PS can be transformed in the solid state into a microphase-separated BCP without the use of any additives. Correlation hole scattering of the PSM-b-PS in the phase mixed state yields a segmental interaction parameter (x) given by x = 0.0196 + 4.694/T, where T is the absolute temperature. With the symmetric BCPs used in this study, the ordered lamellar microdomain pitch was determined by small-angle X-ray scattering (SAXS) as a function of the degree of polymerization (16