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聚三芳胺/聚芴共混体系中的链构象研究

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聚(9,9-二辛基芴)(PFO)是一类经典蓝光共轭高分子,因其特殊的有序性平面化β构象而广受关注,该构象有助于提高薄膜器件的载流子迁移率等性能.近期有研究发现将PFO与其他类型高分子共混有助于提高薄膜中β构象含量.基于此,本文研究了共混物聚[双(4-苯基)(2,4,6-三甲基苯基)胺](PTAA)质量比例及共混后溶质浓度对溶液和薄膜中β构象的影响.结果表明:浓度一定时,溶液、薄膜中β构象含量均随PTAA质量的增加而先呈现增加后降低的趋势;而当PTAA/PFO比例一定时,溶液、薄膜中的β构象和有序结构含量均随浓度的增加先增加后降低.分析认为:PTAA可能起到了一定的交联作用,适量PTAA及混合浓度有助于PFO分子链的自折叠,克服空间位阻作用及减少链缠结,从而形成更多β构象.
Study on Chain Conformation in Polytriarylamine/Polyfluorene Blend System
Poly(9,9-dioctylfluorene)(PFO)is a type of classic blue-light conjugated polymer that has attracted widespread attention due to its specially ordered planarized β conformation.Increasing the content of β conformation in the film will help improve device performance such as carrier mobility.Recent studies have found that blending PFO with other types of polymers can help increase the β conformation content in films.Based on this,this paper studied the effects of the content of poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)and the solute concentration of the blend on the β conformation in solutions and films.The results show that:when the concentration is constant,the β conformation content in the solution and film first increases and then decreases with the increases of PTAA content;when the content of PTAA ratio is constant,the β conformation and ordered structure content in the solution and film first increase and then decrease with the increase of concentration.We analyzed that this is related to the self-folding and steric hindrance of the PFO molecular chain in the blend system.

β ConformationPoly(9,9-dioctylfluorene)Poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine](PTAA)ConcentrationBlend

关意佳、秦洁一、张钰华、李涛、程东阳、刘龙辉、陆丹

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河南理工大学材料科学与工程学院,焦作 454000

吉林大学超分子结构与材料国家重点实验室,长春 130000

β构象 聚(9,9-二辛基萄)(PFO) 聚[双(4-苯基)(2,4,6-三甲基苯基)胺](PTAA) 浓度 共混

国家自然科学基金项目国家自然科学基金项目中国博士后科学基金面上项目河南省博士后科研项目河南理工大学博士基金河南理工大学博士基金河南省高校基本科研业务费专项资金

21905078219070242023M730987HN2022035B2018-47B2019-37NSFRF230407

2024

10.14028/j.cnki.1003-3726.2024.24.013

高分子通报
中国化学会 中国科学院化学研究所

高分子通报

CSTPCD北大核心
影响因子：0.63
ISSN：1003-3726
年,卷(期)：2024.37(7)