PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION

Bibliographic Details
Main Author:	ZHANG, CHENG
Language:	English
Published:	University of Akron / OhioLINK 2017
Subjects:	Polymer Chemistry
Online Access:	http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105

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spelling	ndltd-OhioLink-oai-etd.ohiolink.edu-akron14953814092461052021-08-03T07:02:43Z PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION ZHANG, CHENG Polymer Chemistry Pigmented organic/inorganic anticorrosive hybrid coatings were formulated by polysiloxane as the inorganic phase and polyurethane as the organic phase. The polyurethane provides excellent mechanical properties and barrier properties and the polysiloxane is severed as the corrosion inhibitor and adhesion promoter. This study concentrated on the effect of TEOS oligomers on pigmented organic/inorganic hybrid coatings. Tetraethyl orthosilicate (TEOS) oligomers were synthesized from TEOS monomer through the sol-gel process. Polyurethane was prepared from hexamethylene diisocyanate isocyanurates (abbreviated as 3HDI), alkoxysilane modified 3HDI and polyesters. Polyesters were prepared from 1,6-hexanediol (HD), isophthalic acid (IPA), 1,1,1-tris(hydroxymethyl)propane (TMP) and adipic acid (AA). The modified 3HDI were synthesized from (3-Aminopropyl) triethoxysilane (APTES) and 3HDI. TEOS oligomers, the polyesters, and modified 3HDI were characterized by FTIR, NMR, and MALDI-MS. Rutile TiO2 was added into coating systems as pigments. Several formulations of hybrid coatings were formulated with different concentration of TEOS oligomers and pigment volume concentration. Optical microscope was used to study the dispersion of TiO2. Electrochemical Impedance Spectroscopy was implemented to show the trend of corrosion resistance of different formulations. Furthermore, the corrosion resistance was furtherly studied by Salt Spray (ASTM B-117) and acid undercutting. Additionally, differential scanning calorimetry was utilized to investigate the variety of thermal property. The morphology of corrosion products was investigated using an optical microscope. Fracture toughness, elastic energy release rate, and tensile property were utilized to evaluate the mechanical property of cured coatings. Finally, adhesion performance, impact resistance, and hardness properties were also examined. It was surmised that the corrosion resistance obviously decreased with the high concentration of TEOS oligomers. 2017 English text University of Akron / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105 http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105 unrestricted This thesis or dissertation is protected by copyright: some rights reserved. It is licensed for use under a Creative Commons license. Specific terms and permissions are available from this document's record in the OhioLINK ETD Center.
collection	NDLTD
language	English
sources	NDLTD
topic	Polymer Chemistry
spellingShingle	Polymer Chemistry ZHANG, CHENG PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION
author	ZHANG, CHENG
author_facet	ZHANG, CHENG
author_sort	ZHANG, CHENG
title	PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION
title_short	PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION
title_full	PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION
title_fullStr	PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION
title_full_unstemmed	PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION
title_sort	pigmented polyurethane/polysiloxane hybrid coatings for corrosion protection
publisher	University of Akron / OhioLINK
publishDate	2017
url	http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105
work_keys_str_mv	AT zhangcheng pigmentedpolyurethanepolysiloxanehybridcoatingsforcorrosionprotection
_version_	1719452282732412928

PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION

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