Title:
Effect of chemical structure and crosslinking density on the thermo-mechanical properties and toughness of (meth)acrylate shape-memory polymer networks

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dc.contributor.advisor Gall, Ken
dc.contributor.author Safranski, David L. en_US
dc.contributor.committeeMember David Bucknall
dc.contributor.committeeMember Karl Jacob
dc.contributor.department Materials Science and Engineering en_US
dc.date.accessioned 2008-06-10T20:42:08Z
dc.date.available 2008-06-10T20:42:08Z
dc.date.issued 2008-03-31 en_US
dc.description.abstract The objective of this work is to characterize and understand structure- mechanical property relationships in (meth)acrylate networks. The networks are synthesized from mono-functional (meth)acrylates with systematically varying sidegroup structure and multi-functional crosslinkers with varying mole fraction and functionality. Fundamental trends are established between the network chemical structure, crosslink density, glass transition temperature, rubbery modulus, failure strain, and toughness. The glass transition temperature of the networks ranged from -29 to 112 °C, and the rubbery modulus ranged from 2.8 to 129.5 MPa. At low crosslink density (Er < 10 MPa) network chemistry has a profound effect on network toughness. At high crosslink densities (Er > 10 MPa), network chemistry has little influence on material toughness. The characteristic ratio of the mono-functional (meth)acrylates components is unable to predict trends in thermoset toughness as a function of chemical structure, as is accomplished for thermoplastics. The cohesive energy density is a better tool for prediction of network mechanical properties. Due to superior mechanical properties, networks with phenyl ring sidegroups are further investigated to understand the effect of phenyl ring distance on toughness. This work provides a fundamental basis for designing (meth)acrylate shape memory polymer networks with specific failure strain, toughness, glass transition temperature, and rubbery modulus. en_US
dc.description.degree M.S. en_US
dc.identifier.uri http://hdl.handle.net/1853/22635
dc.publisher Georgia Institute of Technology en_US
dc.subject Shape memory en_US
dc.subject Toughness en_US
dc.subject Polymers en_US
dc.subject Mechanical properties en_US
dc.subject Chemical structure en_US
dc.subject Acrylate en_US
dc.subject.lcsh Shape memory alloys
dc.subject.lcsh Methyl methacrylate
dc.subject.lcsh Polymer networks
dc.title Effect of chemical structure and crosslinking density on the thermo-mechanical properties and toughness of (meth)acrylate shape-memory polymer networks en_US
dc.type Text
dc.type.genre Thesis
dspace.entity.type Publication
local.contributor.corporatename School of Materials Science and Engineering
local.contributor.corporatename College of Engineering
relation.isOrgUnitOfPublication 21b5a45b-0b8a-4b69-a36b-6556f8426a35
relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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