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PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION

ZHANG, CHENG
http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105

Abstract Details

2017, Master of Science, University of Akron, Polymer Engineering.
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.
Mark Soucek (Advisor)
Younjin Min (Committee Chair)
Xiong Gong (Committee Member)
Polymer Chemistry

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Citations

  • ZHANG, C. (2017). PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105

    APA Style (7th edition)

  • ZHANG, CHENG. PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION. 2017. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105.

    MLA Style (8th edition)

  • ZHANG, CHENG. "PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION." Master's thesis, University of Akron, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1495381409246105

    Chicago Manual of Style (17th edition)

akron1495381409246105
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© , some rights reserved.Creative Commons License PIGMENTED POLYURETHANE/POLYSILOXANE HYBRID COATINGS FOR CORROSION PROTECTION by CHENG ZHANG is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Akron and OhioLINK.