Preparation of a poly(L-lactide-co-caprolactone) copolymer using a novel tin(II) alkoxide initiator and its fiber processing for potential use as an absorbable monofilament surgical suture


A poly(L-lactide-co-caprolactone) copolymer, P(LL-co-CL), of composition 75:25 mol% was synthesized via the bulk ring-opening copolymerization of L-lactide and ε-caprolactone using a novel bis[tin(II) monooctoate] diethylene glycol coordination-insertion initiator, OctSn-OCH2CH2OCH2CH2O-SnOct. The P(LL-co-CL) copolymer obtained was characterized by a combination of analytical techniques, namely nuclear magnetic resonance spectroscopy, gel permeation chromatography, dilute-solution viscometry, differential scanning calorimetry, and thermogravimetric analysis. For processing into a monofilament fiber, the copolymer was melt spun with minimal draw to give a largely amorphous and unoriented as-spun fiber. The fiber's oriented semicrystalline morphology, necessary to give the required balance of mechanical properties, was then developed via a sequence of controlled offline hot-drawing and annealing steps. Depending on the final draw ratio, the fibers obtained had tensile strengths in the region of 200–400 MPa.

Publication DOI:
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Chemical Engineering & Applied Chemistry
College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR)
Additional Information: This is an Accepted Manuscript of an article published by Taylor & Francis in International Journal of Polymeric Materials and Polymeric Biomaterials on 8/1/16, available online:
Uncontrolled Keywords: Caprolactone,Polymers and Plastics,Analytical Chemistry,General Chemical Engineering
Publication ISSN: 0091-4037
Last Modified: 08 Jul 2024 07:21
Date Deposited: 19 Aug 2019 10:07
Full Text Link: http://www.tand ... 37.2015.1119683
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2016
Published Online Date: 2016-01-08
Accepted Date: 2015-10-30
Submitted Date: 2015-06-03
Authors: Ruengde, Sujitra
Siripitayananon, Jintana
Molloy, Robert
Somsunan, Runglawan
Topham, Paul D. (ORCID Profile 0000-0003-4152-6976)
Tighe, Brian J. (ORCID Profile 0000-0001-9601-8501)



Version: Accepted Version

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