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Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups

Polyimide (PI) composite films with thicknesses of approximately 100 µm were prepared via a sol–gel reaction of 3-aminopropyltrimethoxysilane (APTMS) with poly(amic acid) (PAA) composite solutions using a thermal imidization process. PAA was synthesized by a conventional condensation reaction of two...

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Autores principales: Moon, Kwan Ho, Chae, Boknam, Kim, Ki Seung, Lee, Seung Woo, Jung, Young Mee
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473655/
https://www.ncbi.nlm.nih.gov/pubmed/30960474
http://dx.doi.org/10.3390/polym11030489
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author Moon, Kwan Ho
Chae, Boknam
Kim, Ki Seung
Lee, Seung Woo
Jung, Young Mee
author_facet Moon, Kwan Ho
Chae, Boknam
Kim, Ki Seung
Lee, Seung Woo
Jung, Young Mee
author_sort Moon, Kwan Ho
collection PubMed
description Polyimide (PI) composite films with thicknesses of approximately 100 µm were prepared via a sol–gel reaction of 3-aminopropyltrimethoxysilane (APTMS) with poly(amic acid) (PAA) composite solutions using a thermal imidization process. PAA was synthesized by a conventional condensation reaction of two diamines, 3,5-diaminobenzoic acid (DABA), which has a carboxylic acid side group, and 2,2′-bis(trifluoromethyl)benzidine (TFMB), with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) in N,N-dimethylacetamide (DMAc). The PAA–silica composite solutions were prepared by mixing PAA with carboxylic acid side groups and various amounts of APTMS in a sol–gel process in DMAc using hydrochloric acid as a catalyst. The obtained PI–silica composite films showed relatively good thermal stability, and the thermal stability increased with increasing APTMS content. The optical properties and in-plane coefficient of thermal expansion (CTE) values of the PI–silica composite films were investigated. The CTE of the PI–silica composite films changed from 52.0 to 42.1 ppm/°C as the initial content of APTMS varied. The haze values and yellowness indices of the composite films increased as a function of the APTMS content.
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spelling pubmed-64736552019-05-03 Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups Moon, Kwan Ho Chae, Boknam Kim, Ki Seung Lee, Seung Woo Jung, Young Mee Polymers (Basel) Article Polyimide (PI) composite films with thicknesses of approximately 100 µm were prepared via a sol–gel reaction of 3-aminopropyltrimethoxysilane (APTMS) with poly(amic acid) (PAA) composite solutions using a thermal imidization process. PAA was synthesized by a conventional condensation reaction of two diamines, 3,5-diaminobenzoic acid (DABA), which has a carboxylic acid side group, and 2,2′-bis(trifluoromethyl)benzidine (TFMB), with 4,4′-(hexafluoroisopropylidene)diphthalic anhydride (6FDA) in N,N-dimethylacetamide (DMAc). The PAA–silica composite solutions were prepared by mixing PAA with carboxylic acid side groups and various amounts of APTMS in a sol–gel process in DMAc using hydrochloric acid as a catalyst. The obtained PI–silica composite films showed relatively good thermal stability, and the thermal stability increased with increasing APTMS content. The optical properties and in-plane coefficient of thermal expansion (CTE) values of the PI–silica composite films were investigated. The CTE of the PI–silica composite films changed from 52.0 to 42.1 ppm/°C as the initial content of APTMS varied. The haze values and yellowness indices of the composite films increased as a function of the APTMS content. MDPI 2019-03-13 /pmc/articles/PMC6473655/ /pubmed/30960474 http://dx.doi.org/10.3390/polym11030489 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Moon, Kwan Ho
Chae, Boknam
Kim, Ki Seung
Lee, Seung Woo
Jung, Young Mee
Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups
title Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups
title_full Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups
title_fullStr Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups
title_full_unstemmed Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups
title_short Preparation and Characterization of Transparent Polyimide–Silica Composite Films Using Polyimide with Carboxylic Acid Groups
title_sort preparation and characterization of transparent polyimide–silica composite films using polyimide with carboxylic acid groups
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6473655/
https://www.ncbi.nlm.nih.gov/pubmed/30960474
http://dx.doi.org/10.3390/polym11030489
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