Publication: Contribution of soft segment entanglement on the tensile properties of silicone–urea copolymers with low hard segment contents
dc.contributor.coauthor | Wilkes, Garth L. | |
dc.contributor.department | Department of Chemistry | |
dc.contributor.department | N/A | |
dc.contributor.department | Department of Chemistry | |
dc.contributor.kuauthor | Yılgör, İskender | |
dc.contributor.kuauthor | Eynur, Tuğba | |
dc.contributor.kuauthor | Yılgör, Emel | |
dc.contributor.kuprofile | Faculty Member | |
dc.contributor.kuprofile | Master Student | |
dc.contributor.kuprofile | Researcher | |
dc.contributor.other | Department of Chemistry | |
dc.contributor.schoolcollegeinstitute | College of Sciences | |
dc.contributor.schoolcollegeinstitute | Graduate School of Sciences and Engineering | |
dc.contributor.schoolcollegeinstitute | College of Sciences | |
dc.contributor.yokid | 24181 | |
dc.contributor.yokid | N/A | |
dc.contributor.yokid | N/A | |
dc.date.accessioned | 2024-11-09T23:14:09Z | |
dc.date.issued | 2009 | |
dc.description.abstract | Novel, segmented thermoplastic silicone-urea (TPSU) copolymers based on rather high molecular weight aminopropyl terminated polydimethylsiloxane (PDMS) soft segments (<M(n)> 10,800 and 31,500 g/mol), a cycloaliphatic diisocyanate (HMDI) and various diamine chain extenders were synthesized. Copolymers with very low urea hard segment contents of 1.43-14.4% by weight were prepared. In spite of very low hard segment contents, solution cast films showed very good microphase separation and displayed reasonable mechanical properties. Tensile strengths of TPSU copolymers showed a linear dependence on their urea hard segment contents, regardless of the structure of the diamine chain extender used. The modulus of silicone-urea copolymers is dependent on the urea concentration, but not on the extender type or PDMS molecular weight. When silicone-urea copolymers with identical urea hard segment contents were compared, copolymers based on PDMS-31,500 showed higher elongation at break values and ultimate tensile strengths than those based on PDMS-10,800. Since the critical entanglement molecular weight (M(e)) of PDMS is about 24,500 g/mol, these results suggest there is a significant contribution from soft segment chain entanglement effects in the PDMS-31,500 system regarding the tensile properties and failure mechanisms of the silicone-urea copolymers. | |
dc.description.indexedby | WoS | |
dc.description.indexedby | Scopus | |
dc.description.issue | 19 | |
dc.description.openaccess | NO | |
dc.description.publisherscope | International | |
dc.description.sponsorship | Wacker Chemie, Munich Germany We would like to thank Wacker Chemie, Munich Germany, for providing financial support to this research project. We also would like to thank them for their supply of PDMS oligomers. | |
dc.description.volume | 50 | |
dc.identifier.doi | 10.1016/j.polymer.2009.07.016 | |
dc.identifier.eissn | 1873-2291 | |
dc.identifier.issn | 0032-3861 | |
dc.identifier.quartile | Q1 | |
dc.identifier.scopus | 2-s2.0-69249115843 | |
dc.identifier.uri | http://dx.doi.org/10.1016/j.polymer.2009.07.016 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14288/10107 | |
dc.identifier.wos | 272959200004 | |
dc.keywords | Polydimethylsiloxane | |
dc.keywords | Polyurethane | |
dc.keywords | Entanglement polymers | |
dc.language | English | |
dc.publisher | Elsevier Sci Ltd | |
dc.source | Polymer | |
dc.subject | Polymers | |
dc.subject | Polymerization | |
dc.title | Contribution of soft segment entanglement on the tensile properties of silicone–urea copolymers with low hard segment contents | |
dc.type | Journal Article | |
dspace.entity.type | Publication | |
local.contributor.authorid | 0000-0002-7756-4192 | |
local.contributor.authorid | N/A | |
local.contributor.authorid | 0000-0001-9133-3377 | |
local.contributor.kuauthor | Yılgör, İskender | |
local.contributor.kuauthor | Eynur, Tuğba | |
local.contributor.kuauthor | Yılgör, Emel | |
relation.isOrgUnitOfPublication | 035d8150-86c9-4107-af16-a6f0a4d538eb | |
relation.isOrgUnitOfPublication.latestForDiscovery | 035d8150-86c9-4107-af16-a6f0a4d538eb |