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Antireflective polyimide based films.

Cao, Yuanmei.

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Antireflective polyimide based films.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Antireflective polyimide based films./
Author:	Cao, Yuanmei.
Description:	198 p.
Notes:	Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.
Contained By:	Dissertation Abstracts International73-11B(E).
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3516057
ISBN:	9781267440198

Antireflective polyimide based films.
Cao, Yuanmei.

Antireflective polyimide based films. - 198 p.

Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.

Thesis (Ph.D.)--The University of Akron, 2012.

The goal of this work was to prepare antireflective and anti-abrasion films using polyimide and organically modified silica nanoparticle thin films. A series of thin film were prepared from colorless and soluble polyimide with organically modified silica colloids via a solution casting method. The polyimide was selected for its optical properties. Three type of organically modified silica nanoparticles were prepared by grafting polysiloxane, polyfluoroester and fluoroalkyl groups onto silica nanoparticles. The molecular weight of the polysiloxane, polyfluoroester and the amount of fluorinated alkyl groups were varied. The organically modified silica colloids were characterized by TEM, DLS, FTIR, 1H NMR, solid state 13C NMR and solid state 29Si NMR. The coatings were characterized by UV-Vis transmittance spectra and SEM. The effect of modified silica loading, the molecular weight of polymer and type of solvent on AR properties were studied. An enhancement in antireflective activity was observed for 1 wt% LPDMS modified (low molecular weight) silica coatings, 3 wt% fluorosilica-10 and 3% L-MPS-PF-SILICA nanoparticles (low molecular weight polyfluoroester modified silica) in dimethylacetamide (DMAc). In comparison with cyclopentanone (CPT), DMAc favors migration of silica particles towards coating-air interface giving higher transmittance. The migration of particles to the surface and consequent increased surface roughness were observed by SEM. The present study suggested a roll to roll solution casting method to create antireflective coatings. This approach had potential to be used for a one-step large-scale manufacturing of antireflective coating.

ISBN: 9781267440198Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Antireflective polyimide based films.
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020 $a 9781267440198
035 $a (MiAaPQ)AAI3516057
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100 1 $a Cao, Yuanmei. $3 2094128
245 1 0 $a Antireflective polyimide based films.
300 $a 198 p.
500 $a Source: Dissertation Abstracts International, Volume: 73-11(E), Section: B.
500 $a Advisers: Mark Soucek; Mukerrem Cakmak.
502 $a Thesis (Ph.D.)--The University of Akron, 2012.
520 $a The goal of this work was to prepare antireflective and anti-abrasion films using polyimide and organically modified silica nanoparticle thin films. A series of thin film were prepared from colorless and soluble polyimide with organically modified silica colloids via a solution casting method. The polyimide was selected for its optical properties. Three type of organically modified silica nanoparticles were prepared by grafting polysiloxane, polyfluoroester and fluoroalkyl groups onto silica nanoparticles. The molecular weight of the polysiloxane, polyfluoroester and the amount of fluorinated alkyl groups were varied. The organically modified silica colloids were characterized by TEM, DLS, FTIR, 1H NMR, solid state 13C NMR and solid state 29Si NMR. The coatings were characterized by UV-Vis transmittance spectra and SEM. The effect of modified silica loading, the molecular weight of polymer and type of solvent on AR properties were studied. An enhancement in antireflective activity was observed for 1 wt% LPDMS modified (low molecular weight) silica coatings, 3 wt% fluorosilica-10 and 3% L-MPS-PF-SILICA nanoparticles (low molecular weight polyfluoroester modified silica) in dimethylacetamide (DMAc). In comparison with cyclopentanone (CPT), DMAc favors migration of silica particles towards coating-air interface giving higher transmittance. The migration of particles to the surface and consequent increased surface roughness were observed by SEM. The present study suggested a roll to roll solution casting method to create antireflective coatings. This approach had potential to be used for a one-step large-scale manufacturing of antireflective coating.
520 $a Four acrylated bismaleimide were made via two-step process. The first step involved the solution imidization to form hydroxylated bismaleimide. In the second step, hydroxylated bismaleimide was reacted with acryloyl chloride to form acrylated bismaleimide. The acrylated bismaleimide were characterized by FTIR, 1H NMR, 13C NMR, GPC and mass spectra. The acrylated bismaleimide was formulated with acryloyl morpholine and photoinitiator with or without addition of PDMS-silica nanoparticles to achieve UV-curable thin films. The photo-cure kinetics of four neat acrylated bismaleimide and the formulation were investigated by real-time FTIR, photo-DSC and rheometer. The kinetic analysis revealed that PDMS-silica accelerated the photocure rate and increased the conversion of both acrylate double bond and maleimide double bond. The dispersion of PDMS-silica nanoparticles affected the abrasion resistance. The optimal abrasion resistance was achieved with 3.0% wt PDMS modified silica nanoparticle loading.
590 $a School code: 0003.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Chemistry, Polymer. $3 1018428
690 $a 0794
690 $a 0495
710 2 $a The University of Akron. $b Polymer Engineering. $3 2094129
773 0 $t Dissertation Abstracts International $g 73-11B(E).
790 $a 0003
791 $a Ph.D.
792 $a 2012
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3516057