Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone

Four metal tert-butoxides, namely: aluminum(III) tert-butoxide, Al(Ot-C 4H 9) 3, tin(II) tert-butoxide, Sn(Ot-C 4H 9) 2, titanium(IV) tert-butoxide, Ti(Ot-C...

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Main Authors: W. Meelua, V. Bua-Own, R. Molloy, W. Punyodom
Format: Book Series
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/51636
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spelling th-cmuir.6653943832-516362018-09-04T06:05:34Z Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone W. Meelua V. Bua-Own R. Molloy W. Punyodom Engineering Four metal tert-butoxides, namely: aluminum(III) tert-butoxide, Al(Ot-C 4H 9) 3, tin(II) tert-butoxide, Sn(Ot-C 4H 9) 2, titanium(IV) tert-butoxide, Ti(Ot-C 4H 9) 4, and lithium tert-butoxide, Li(Ot-C 4H 9), were used as initiators in the bulk ring-opening polymerization (ROP) of ε-caprolactone (CL). The polymerizations were carried out at 120 °C for 72 hrs. It was found that the Al(Ot-C 4H 9) 3 only partially dissolved in the CL monomer and gave a low % conversion. The Li(Ot-C 4H 9) initiator did not dissolve and gave no polymerization. In contrast, the Sn(Ot-C 4H 9) 2 initiator dissolved completely, albeit very slowly, and gave a high % conversion. The Ti(Ot-C 4H 9) 4 initiator was by far the easiest and quickest to dissolve and also gave a high % conversion. Consequently, Ti(Ot-C 4H 9) 4-initiated polymerization was studied further by dilatometry at 120 °C. From the kinetic results, a first-order rate constant, k p, of 0.120 l mol -1 min -1 was obtained. © (2012) Trans Tech Publications. 2018-09-04T06:05:34Z 2018-09-04T06:05:34Z 2012-05-15 Book Series 10226680 2-s2.0-84860821595 10.4028/www.scientific.net/AMR.506.142 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84860821595&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/51636
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Engineering
spellingShingle Engineering
W. Meelua
V. Bua-Own
R. Molloy
W. Punyodom
Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
description Four metal tert-butoxides, namely: aluminum(III) tert-butoxide, Al(Ot-C 4H 9) 3, tin(II) tert-butoxide, Sn(Ot-C 4H 9) 2, titanium(IV) tert-butoxide, Ti(Ot-C 4H 9) 4, and lithium tert-butoxide, Li(Ot-C 4H 9), were used as initiators in the bulk ring-opening polymerization (ROP) of ε-caprolactone (CL). The polymerizations were carried out at 120 °C for 72 hrs. It was found that the Al(Ot-C 4H 9) 3 only partially dissolved in the CL monomer and gave a low % conversion. The Li(Ot-C 4H 9) initiator did not dissolve and gave no polymerization. In contrast, the Sn(Ot-C 4H 9) 2 initiator dissolved completely, albeit very slowly, and gave a high % conversion. The Ti(Ot-C 4H 9) 4 initiator was by far the easiest and quickest to dissolve and also gave a high % conversion. Consequently, Ti(Ot-C 4H 9) 4-initiated polymerization was studied further by dilatometry at 120 °C. From the kinetic results, a first-order rate constant, k p, of 0.120 l mol -1 min -1 was obtained. © (2012) Trans Tech Publications.
format Book Series
author W. Meelua
V. Bua-Own
R. Molloy
W. Punyodom
author_facet W. Meelua
V. Bua-Own
R. Molloy
W. Punyodom
author_sort W. Meelua
title Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
title_short Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
title_full Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
title_fullStr Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
title_full_unstemmed Comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
title_sort comparison of metal alkoxide initiators in the ring-opening polymerization of caprolactone
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84860821595&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/51636
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