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dc.contributor.advisorHerring, Andrew M.
dc.contributor.advisorDorgan, John R.
dc.contributor.authorMoran, Christopher S.
dc.date.accessioned2017-10-13T17:28:10Z
dc.date.accessioned2022-02-03T12:59:53Z
dc.date.available2018-10-13T17:28:11Z
dc.date.available2022-02-03T12:59:53Z
dc.date.issued2017
dc.identifierMoran_mines_0052E_11363.pdf
dc.identifierT 8371
dc.identifier.urihttps://hdl.handle.net/11124/171825
dc.descriptionIncludes bibliographical references.
dc.description2017 Fall.
dc.description.abstractSynthetic polymers derived from renewable resources offer opportunities to improve sustainability. Compared to their fossil fuel based counterparts, bio-based polymers may be designed to meet the same physical property requirements while reducing primary energy requirements and greenhouse gas emissions. Polymer blending and reinforcement by fibers in composites are established techniques to enhance physical properties. These techniques may be used to develop unique materials systems that broaden the application range of bio-based polymers. This thesis presents an evaluation of structure-property relationships in several blend systems incorporating commercially successful bio-based polymers of particular interest, then introduces a novel bio-based thermoset resin and evaluates its suitability for use in fiber reinforced composites. Miscibility is proved in blends of polyamide-4,10 and polyamide-6,10, enabling the ability to fine tune physical properties according to relative compositions using simple melt-mixing techniques. Quaternary blends of poly(L-lactide), poly(D-lactide), isotactic poly(methyl methacrylate), and syndiotactic methyl (methyl methacrylate) exhibit simultaneous stereocomplex crystallization and homopolymer crystallization within a single amorphous phase, and the presence of poly(methyl methacrylate) promotes stereocomplex formation in poly(lactide). To develop a bio-based thermoset resin, poly(lactide) is simultaneously cleaved into oligomers and functionalized with vinyl end-groups so that it may act as a cross-linking agent in a free-radical polymerization with methyl methacrylate. The low viscosity resin exhibits outstanding physical properties when cured and reinforced with unidirectional glass fiber composites.
dc.format.mediumborn digital
dc.format.mediumdoctoral dissertations
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2017 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectbiopolymers
dc.subjectpolylactide
dc.subjectthermoset
dc.subjectcomposites
dc.subjectbioplastics
dc.subjectsustainability
dc.titleDesign and characterization of bio-based polymer blends and composites
dc.typeText
dc.contributor.committeememberKnauss, Daniel M.
dc.contributor.committeememberKrebs, Melissa D.
dc.contributor.committeememberSamaniuk, Joseph R.
dcterms.embargo.terms2018-10-13
dcterms.embargo.expires2018-10-13
thesis.degree.nameDoctor of Philosophy (Ph.D.)
thesis.degree.levelDoctoral
thesis.degree.disciplineChemical and Biological Engineering
thesis.degree.grantorColorado School of Mines
dc.rights.accessEmbargo Expires: 10/13/2018


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