Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution
Two series of thermoplastic elastomers, based on poly(dimethylsiloxane) PDMS, as the soft segment and poly(butylene terephthalate), PBT, as the hard segment, were synthesized by catalyzed transesterification, from dimethyl terephthalate, DMT, silanol-terminated poly(dimethylsiloxane), PDMS-OH Mn=175...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2005-01-01
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| Series: | Journal of the Serbian Chemical Society |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390512469D.pdf |
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| author | Dojčinović Biljana P. Antić Vesna V. Vučković Marija V. Đonlagić Jasna A. |
| author_facet | Dojčinović Biljana P. Antić Vesna V. Vučković Marija V. Đonlagić Jasna A. |
| author_sort | Dojčinović Biljana P. |
| collection | DOAJ |
| description | Two series of thermoplastic elastomers, based on poly(dimethylsiloxane) PDMS, as the soft segment and poly(butylene terephthalate), PBT, as the hard segment, were synthesized by catalyzed transesterification, from dimethyl terephthalate, DMT, silanol-terminated poly(dimethylsiloxane), PDMS-OH Mn=1750g/mol, and 1,4-butanediol, BD. The mole ratio of the starting comonomers was selected to result in a constant hard to soft weight ratio of 55:45. The first series was synthesized in order to determine the optimal mole ratio of BD and DMT for the synthesis of high molecular weight thermoplastic poly(ester-siloxane)s, TPESs. The second series was performed in the presence of the high-boiling solvent, 1,2,4-trichlorbenzene in order to increase the mixing between the extremely non-polar siloxane prepolymer and the polar reactants, DMT and BD, and, therefore, avoid phase separation during synthesis. The structure and composition of the synthesized poly(ester-siloxane)s were verified by 1H-NMR spectroscopy, while the melting temperatures and degree of crystallinity were determined by differential scanning calorimetry (DSC). The effectiveness of the incorporation of the silanol-terminated poly( dimethylsiloxane) into the polyester chains was verified by chloroform extraction. The rheological properties of the poly(ester-siloxane)s were investigated by dynamic mechanical spectroscopy (DMA). |
| first_indexed | 2024-12-18T14:17:35Z |
| format | Article |
| id | doaj.art-57236802cc0f4d459e45ad30e9bcb1e5 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 1820-7421 |
| language | English |
| last_indexed | 2024-12-18T14:17:35Z |
| publishDate | 2005-01-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-57236802cc0f4d459e45ad30e9bcb1e52022-12-21T21:04:57ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51391820-74212005-01-0170121469148510.2298/JSC0512469D0352-51390512469DSynthesis of thermoplastic poly(ester-siloxane)s in the melt and in solutionDojčinović Biljana P.0Antić Vesna V.1Vučković Marija V.2Đonlagić Jasna A.3IHTM, Centar za hemiju - Odeljenje za polimerne materijale, BeogradIHTM, Centar za hemiju - Odeljenje za polimerne materijale, BeogradIHTM, Centar za hemiju - Odeljenje za polimerne materijale, BeogradTehnološko-metalurški fakultet, BeogradTwo series of thermoplastic elastomers, based on poly(dimethylsiloxane) PDMS, as the soft segment and poly(butylene terephthalate), PBT, as the hard segment, were synthesized by catalyzed transesterification, from dimethyl terephthalate, DMT, silanol-terminated poly(dimethylsiloxane), PDMS-OH Mn=1750g/mol, and 1,4-butanediol, BD. The mole ratio of the starting comonomers was selected to result in a constant hard to soft weight ratio of 55:45. The first series was synthesized in order to determine the optimal mole ratio of BD and DMT for the synthesis of high molecular weight thermoplastic poly(ester-siloxane)s, TPESs. The second series was performed in the presence of the high-boiling solvent, 1,2,4-trichlorbenzene in order to increase the mixing between the extremely non-polar siloxane prepolymer and the polar reactants, DMT and BD, and, therefore, avoid phase separation during synthesis. The structure and composition of the synthesized poly(ester-siloxane)s were verified by 1H-NMR spectroscopy, while the melting temperatures and degree of crystallinity were determined by differential scanning calorimetry (DSC). The effectiveness of the incorporation of the silanol-terminated poly( dimethylsiloxane) into the polyester chains was verified by chloroform extraction. The rheological properties of the poly(ester-siloxane)s were investigated by dynamic mechanical spectroscopy (DMA).http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390512469D.pdfpoly(ester-siloxane)sthermoplastic elastomerssilanol-terminated poly(dimethylsiloxane) |
| spellingShingle | Dojčinović Biljana P. Antić Vesna V. Vučković Marija V. Đonlagić Jasna A. Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution Journal of the Serbian Chemical Society poly(ester-siloxane)s thermoplastic elastomers silanol-terminated poly(dimethylsiloxane) |
| title | Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution |
| title_full | Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution |
| title_fullStr | Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution |
| title_full_unstemmed | Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution |
| title_short | Synthesis of thermoplastic poly(ester-siloxane)s in the melt and in solution |
| title_sort | synthesis of thermoplastic poly ester siloxane s in the melt and in solution |
| topic | poly(ester-siloxane)s thermoplastic elastomers silanol-terminated poly(dimethylsiloxane) |
| url | http://www.doiserbia.nb.rs/img/doi/0352-5139/2005/0352-51390512469D.pdf |
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