Structure-property relations in epoxy metal-ion polymers

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dc.contributor.advisorArmeniades, C. D.en_US
dc.creatorOma, Kenton H.en_US
dc.date.accessioned2018-12-18T21:17:18Zen_US
dc.date.available2018-12-18T21:17:18Zen_US
dc.date.issued1977en_US
dc.description.abstractThe feasibility of crosslinking a diepoxy (EPON 828 Shell Chemical Company) with paraaminopyridine (PAP) coordinated to various metal-ions was investigated by means of wide angle x-ray diffraction, infrared spectroscopy, and metallographic examination. Insolubility of the metal-ion ligands in EPON 828, resulting from their ionic nature, necessitated the development of a solution polymerization based on acetone. The effect of molecular structure on the internal friction of these polymers was studied using dynamic mechanical measurements at temperatures from 8°K to Tg with a free oscillating inverted torsional pendulum at 1 Hz. Dynamic mechanical properties of a model system were established by studying the chemically and sterically similar, EPON 828-methylene dianaline (MDA) polymer. The y relaxation temperature, intensity, and the modulus defect decreased with stoichiometrically excessive epoxy and the y relaxation intensity increased with excess MDA. As expected, Tg was maximized in a stoichiometric system. A new mechanical relaxation appeared near 275°K for all specimens prepared from acetone solution. The peak may be due to a relaxation of hydroxy ether links which are bound by secondary forces to residual acetone. Attempts to react EPON 828 with Ni(PAP)x:Cl2 directly and from solution were unsuccessful in forming a completely amorphous highly crosslinked polymer system. However, a solution polymerization technique, using acetone as the solvent was developed. This technique resulted in complete reaction of EPON 828 with Co(PAP)2:CI2. The success in this case is attributed to the relatively high solubility of Co(PAP)2 : CI2 in acetone. The metal-ion polymers showed higher glass transition temperatures than EPON 828-MDA, but had lower tensile strengths at room temperature.en_US
dc.format.digitalOriginreformatted digitalen_US
dc.format.extent88 ppen_US
dc.identifier.callnoTHESIS CH.E. 1977 OMAen_US
dc.identifier.citationOma, Kenton H.. "Structure-property relations in epoxy metal-ion polymers." (1977) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/104087">https://hdl.handle.net/1911/104087</a>.en_US
dc.identifier.digitalRICE1714en_US
dc.identifier.urihttps://hdl.handle.net/1911/104087en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.titleStructure-property relations in epoxy metal-ion polymersen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentChemical Engineeringen_US
thesis.degree.disciplineEngineeringen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Scienceen_US
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