Molecular Architecture Effect on the Self-Assembly of Comb-Coil Block Copolymers

分子架構效應於梳狀-柔軟團聯式共聚物自組裝之影響

蔣瑋珊(Wei-Shan Chiang)

指導教授 ： 陳信龍

國立清華大學/工學院/化學工程學系/碩士(2008年)

https://doi.org/10.6843/NTHU.2008.00313

摘要

Self-assembly has drawn much attention of all fields because materials formed by self assembly can provide patterns with ordered array and identical size. The occurrence of self-assembly is usually the outcome of balance between enthalpy and entropy to some degree which causes molecules to self-organize and then induces plentiful phase behaviors and structures. Self-assembly is a spontaneous process, that is, the system can transfer from a disorder state to an order state without intervention of external force and also the system is thermal reversible.
The phenomenon of self-assembly often occurs in soft condense matters such as colloid, surfactant, lipid and block copolymer. Nowadays, utilizing these materials to make product with micrometer- or nanometer-scale ordered structure is a popular research field. In this study, we emphasize the self-assembly of star copolymers and then compare the result with their linear counterparts (diblock copolymers). According to the theories and experimental results from many researchers, we know that the common morphology formed through self-assemble of diblock copolymers are as follows: lamellae, hexagonally packed cylinder, gyroid, body-center-cubic packed sphere.
In our experiment, we use small angle X-ray scattering (SAXS) to investigate the morphology formed by comb-coil star copolymers from the viewpoint of reciprocal space. Then, we utilize transmission electron microscopy (TEM) to observe the real space morphology formed by the samples. In order to investigate the relative orientation of the structure-within-structure morphology, we also conduct large amplitude oscillatory shear (LAOS) experiment.

關鍵字

梳狀雙團聯式共聚物

並列摘要

無資料

並列關鍵字

comb-coil

參考文獻

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