A Faster Approach to Stereocomplex Formation of High Molecular Weight Polylactide Using Supercritical Dimethyl Ether
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Bibi, Gulnaz | - |
dc.contributor.author | Jung, Youngmee | - |
dc.contributor.author | Lim, Jong Choo | - |
dc.contributor.author | Kim, Soo Hyun | - |
dc.date.accessioned | 2021-09-04T16:21:13Z | - |
dc.date.available | 2021-09-04T16:21:13Z | - |
dc.date.created | 2021-06-18 | - |
dc.date.issued | 2015-05 | - |
dc.identifier.issn | 0379-153X | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/93638 | - |
dc.description.abstract | Engineering the polylactide via stereocomplexation with supercritical fluid (SCF) technology paved way to fabricate polymers with enhanced thermal and mechanical properties. We aimed to establish a SCF medium with excellent solubility for PLA without any additional solvent/co-solvent. We, therefore, employed supercritical dimethyl ether to synthesize 100% stereocomplex polylactide from high molecular weight homopolymers with an excellent yield. The remarkable solubility of the homopolymers in dimethyl ether is the key for quick conversion to s-PLA. This study proves a rapid synthesis route of dry s-PLA powder with sc-DME at 250 bar, 70 degrees C and 1.5 h, which are reasonably achievable processing parameters compared to the conventional methods. The degree of stereocomplexation was evaluated under the effect of pressures, temperatures, times, homopolymer-concentrations and molecular weights. An increment in the degree of stereocomplexation was observed with increased temperature and pressure. Complete conversion to s-PLA was obtained for PLLA and PDLA with M-n similar to 200 kg.mol(-1) with a total homopolymer to total DME ratio of 6:100% w/w at prescribed reaction conditions. The degree of stereocomplexation was determined by DSC and confirmed by XRD. Considerable improvement in thermo-mechanical properties of s-PLA was observed. DSC and TGA analyses proved a 50 degrees C enhancement in melting transition and a high onset temperature for thermal degradation of s-PLA respectively. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | POLYMER SOC KOREA | - |
dc.subject | ENANTIOMERIC POLY(LACTIC ACID)S | - |
dc.subject | PHASE-BEHAVIOR | - |
dc.subject | N-VINYLCARBAZOLE | - |
dc.subject | CARBON-DIOXIDE | - |
dc.subject | POLY(L-LACTIDE) | - |
dc.subject | POLYMERIZATION | - |
dc.subject | DEGRADATION | - |
dc.subject | MIXTURES | - |
dc.subject | POLYMERS | - |
dc.subject | STATE | - |
dc.title | A Faster Approach to Stereocomplex Formation of High Molecular Weight Polylactide Using Supercritical Dimethyl Ether | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Kim, Soo Hyun | - |
dc.identifier.doi | 10.7317/pk.2015.39.3.453 | - |
dc.identifier.scopusid | 2-s2.0-84932100271 | - |
dc.identifier.wosid | 000355708300013 | - |
dc.identifier.bibliographicCitation | POLYMER-KOREA, v.39, no.3, pp.453 - 460 | - |
dc.relation.isPartOf | POLYMER-KOREA | - |
dc.citation.title | POLYMER-KOREA | - |
dc.citation.volume | 39 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 453 | - |
dc.citation.endPage | 460 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.description.journalRegisteredClass | kci | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.subject.keywordPlus | ENANTIOMERIC POLY(LACTIC ACID)S | - |
dc.subject.keywordPlus | PHASE-BEHAVIOR | - |
dc.subject.keywordPlus | N-VINYLCARBAZOLE | - |
dc.subject.keywordPlus | CARBON-DIOXIDE | - |
dc.subject.keywordPlus | POLY(L-LACTIDE) | - |
dc.subject.keywordPlus | POLYMERIZATION | - |
dc.subject.keywordPlus | DEGRADATION | - |
dc.subject.keywordPlus | MIXTURES | - |
dc.subject.keywordPlus | POLYMERS | - |
dc.subject.keywordPlus | STATE | - |
dc.subject.keywordAuthor | fast stereocomplex | - |
dc.subject.keywordAuthor | dimethyl ether | - |
dc.subject.keywordAuthor | high molecular weight polylactides | - |
dc.subject.keywordAuthor | supercritical fluid technology | - |
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