Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization
Abstract The Candida antarctica lipase B (Novozyme‐435)‐catalyzed ring‐opening polymerization of ω‐pentadecalactone in toluene was performed. Poly(ω‐pentadecalactone) [poly(PDL)] was obtained in a 93% isolated yield in 4 h with a number‐average molecular weight of 64.5 × 10 3 g/mol and a polydispers...
Published in: | Journal of Polymer Science Part B: Polymer Physics |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2001
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1002/polb.1145 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fpolb.1145 https://onlinelibrary.wiley.com/doi/pdf/10.1002/polb.1145 |
id |
crwiley:10.1002/polb.1145 |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1002/polb.1145 2024-05-19T07:28:47+00:00 Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization Letizia Focarete, Maria Scandola, Mariastella Kumar, Ajay Gross, Richard A. 2001 http://dx.doi.org/10.1002/polb.1145 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fpolb.1145 https://onlinelibrary.wiley.com/doi/pdf/10.1002/polb.1145 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Polymer Science Part B: Polymer Physics volume 39, issue 15, page 1721-1729 ISSN 0887-6266 1099-0488 journal-article 2001 crwiley https://doi.org/10.1002/polb.1145 2024-04-25T08:28:54Z Abstract The Candida antarctica lipase B (Novozyme‐435)‐catalyzed ring‐opening polymerization of ω‐pentadecalactone in toluene was performed. Poly(ω‐pentadecalactone) [poly(PDL)] was obtained in a 93% isolated yield in 4 h with a number‐average molecular weight of 64.5 × 10 3 g/mol and a polydispersity index of 2.0. The solid‐state properties of poly(PDL) were investigated by thermogravimetric analysis (TGA) coupled with mass spectrometry, differential scanning calorimetry (DSC), stress–strain measurements, wide‐angle X‐ray diffraction, and dynamic mechanical and dielectric spectroscopies. Poly(PDL) is a crystalline polymer that melts around 100 °C. The polyester shows good thermal stability, with a main TGA weight loss centered at 425 °C. Because of the high degree of poly(PDL) crystallinity, the glass transition (−27 °C) is revealed by relaxation techniques such as dynamic mechanical and dielectric spectroscopies, rather than by DSC. In addition to the glass transition, the viscoelastic spectrum of poly(PDL) also shows two low‐temperature secondary relaxations centered at −130 (γ) and −90 °C (β). They are attributed to local motions of the long methylene sequence (γ) and complex units involving water associated with the ester groups (β). The mechanical properties of poly(PDL) are typical of a hard, tough material, with an elastic modulus and yield parameters comparable to those of low‐density polyethylene. © 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 39: 1721–1729, 2001 Article in Journal/Newspaper Antarc* Antarctica Wiley Online Library Journal of Polymer Science Part B: Polymer Physics 39 15 1721 1729 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract The Candida antarctica lipase B (Novozyme‐435)‐catalyzed ring‐opening polymerization of ω‐pentadecalactone in toluene was performed. Poly(ω‐pentadecalactone) [poly(PDL)] was obtained in a 93% isolated yield in 4 h with a number‐average molecular weight of 64.5 × 10 3 g/mol and a polydispersity index of 2.0. The solid‐state properties of poly(PDL) were investigated by thermogravimetric analysis (TGA) coupled with mass spectrometry, differential scanning calorimetry (DSC), stress–strain measurements, wide‐angle X‐ray diffraction, and dynamic mechanical and dielectric spectroscopies. Poly(PDL) is a crystalline polymer that melts around 100 °C. The polyester shows good thermal stability, with a main TGA weight loss centered at 425 °C. Because of the high degree of poly(PDL) crystallinity, the glass transition (−27 °C) is revealed by relaxation techniques such as dynamic mechanical and dielectric spectroscopies, rather than by DSC. In addition to the glass transition, the viscoelastic spectrum of poly(PDL) also shows two low‐temperature secondary relaxations centered at −130 (γ) and −90 °C (β). They are attributed to local motions of the long methylene sequence (γ) and complex units involving water associated with the ester groups (β). The mechanical properties of poly(PDL) are typical of a hard, tough material, with an elastic modulus and yield parameters comparable to those of low‐density polyethylene. © 2001 John Wiley & Sons, Inc. J Polym Sci Part B: Polym Phys 39: 1721–1729, 2001 |
format |
Article in Journal/Newspaper |
author |
Letizia Focarete, Maria Scandola, Mariastella Kumar, Ajay Gross, Richard A. |
spellingShingle |
Letizia Focarete, Maria Scandola, Mariastella Kumar, Ajay Gross, Richard A. Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
author_facet |
Letizia Focarete, Maria Scandola, Mariastella Kumar, Ajay Gross, Richard A. |
author_sort |
Letizia Focarete, Maria |
title |
Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
title_short |
Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
title_full |
Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
title_fullStr |
Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
title_full_unstemmed |
Physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
title_sort |
physical characterization of poly(ω‐pentadecalactone) synthesized by lipase‐catalyzed ring‐opening polymerization |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1002/polb.1145 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fpolb.1145 https://onlinelibrary.wiley.com/doi/pdf/10.1002/polb.1145 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_source |
Journal of Polymer Science Part B: Polymer Physics volume 39, issue 15, page 1721-1729 ISSN 0887-6266 1099-0488 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/polb.1145 |
container_title |
Journal of Polymer Science Part B: Polymer Physics |
container_volume |
39 |
container_issue |
15 |
container_start_page |
1721 |
op_container_end_page |
1729 |
_version_ |
1799475869690888192 |