Swelling studies of crosslinked poly( p -phenylene terephthalamide) copolymers in sulfuric acid
dc.contributor.author | Rigney, Jennifer | en_US |
dc.contributor.author | Little, Monica D. | en_US |
dc.contributor.author | Martin, David C. | en_US |
dc.date.accessioned | 2006-04-28T18:20:35Z | |
dc.date.available | 2006-04-28T18:20:35Z | |
dc.date.issued | 1994-04-30 | en_US |
dc.identifier.citation | Rigney, Jennifer; Little, Monica D.; Martin, David C. (1994)."Swelling studies of crosslinked poly( p -phenylene terephthalamide) copolymers in sulfuric acid." Journal of Polymer Science Part B: Polymer Physics 32(6): 1017-1021. <http://hdl.handle.net/2027.42/38868> | en_US |
dc.identifier.issn | 0887-6266 | en_US |
dc.identifier.issn | 1099-0488 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/38868 | |
dc.description.abstract | In an attempt to improve the mechanical properties of extended chain polymers such as poly( p -phenylene terephthalamide) (PPTA), a crosslinkable terephthalic acid derivative (XTA) has been developed which can be incorporated into copolymers in various concentrations and activated after polymerization. The crosslinking of PPTA-co-XTA copolymer particles was investigated through a series of swelling experiments in concentrated H 2 SO 4 . The data show a systematic decrease in equilibrium swelling with increasing XTA content, indicating the XTA units are in fact acting as crosslink sites. Values for crosslink density were calculated from the Flory-Rehner theory of polymer swelling and compared with previous findings on crosslinked rigid polymer network systems. The effective number of crosslinks per XTA unit (efficiency) predicted by the Flory-Rehner theory increases and then decreases with % XTA. The decrease in crosslinking efficiency at high XTA concentrations is consistent with differential scanning calorimetry data which show the enthalpy of XTA reaction decreasing slightly with % XTA. The deviations at low % XTA may represent a failure of the Flory-Rehner theory to properly describe the rubbery elasticity of extended chain polymers. © 1994 John Wiley & Sons, Inc. | en_US |
dc.format.extent | 582925 bytes | |
dc.format.extent | 3118 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | John Wiley & Sons, Inc. | en_US |
dc.subject.other | Chemistry | en_US |
dc.subject.other | Polymer and Materials Science | en_US |
dc.title | Swelling studies of crosslinked poly( p -phenylene terephthalamide) copolymers in sulfuric acid | en_US |
dc.type | Article | en_US |
dc.rights.robots | IndexNoFollow | en_US |
dc.subject.hlbsecondlevel | Materials Science and Engineering | en_US |
dc.subject.hlbtoplevel | Engineering | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, The University of Michigan, 2022 H. H. Dow Building, Ann Arbor, Michigan 48109-2136 | en_US |
dc.contributor.affiliationum | Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, The University of Michigan, 2022 H. H. Dow Building, Ann Arbor, Michigan 48109-2136 | en_US |
dc.contributor.affiliationum | Department of Materials Science and Engineering and the Macromolecular Science and Engineering Center, The University of Michigan, 2022 H. H. Dow Building, Ann Arbor, Michigan 48109-2136 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/38868/1/090320607_ftp.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1002/polb.1994.090320607 | en_US |
dc.identifier.source | Journal of Polymer Science Part B: Polymer Physics | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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