"

Cookies ussage consent

I agree.

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

Preparation of polylactide by ring-opening polymerisation of lactide

K. BOUA-IN1,2, N. CHAIYUT3,2,* , B. KSAPABUTR3,2

Affiliation

  1. Department of Materials Science and Engineering, Faculty of Engineering and Industrial Techology, Silpakorn University, Sanamchandra Palace Campus, Nakhon Pathom, 73000, Thailand
  2. Center of Excellence for Petroleum, Petrochemicals and Advanced Materials, Chulalongkorn University, Bangkok, 10300, Thailand
  3. Department of Materials Science and Engineering, Faculty of Engineering and Industrial Technology, Silpakorn University, Sanamchandra Palace Campus, Nakhon Pathom, 73000, Thailand

Abstract

This study was about to produce high molecular weight polylactide (PLA) with via ring-opening polymerisation. Ringopening polymerisation PLA in this study as accomplished using tin(II)octoate as the catalyst with addition of small amount of luaryl alcohol as the co-catalyst. The effects of reaction temperature and pressure on synthesised polylactide were investigated. As-synthesised products were characterised by 1H-NMR, FT-IR and MALDI-TOF mass spectrometry. The results showed that as-synthesised products were very similar to PLA characteristics reported previously by other researchers. The melting temperature of polylactide was in the range of 130-145๐C. Furthermore, as-synthesised polylactide could not be dissolved completely in many solvents there are just some parts of PLA can be dissolved. Therefore, as-synthesised polylactide could expect to be high molecular weight. In addition, soluble part of polylactide in THF was then characterised by GPC. Moreover, insoluble polylactide was filtered and weighed. With increasing temperature and reducing pressure more residues were collected..

Keywords

Polylactide, Lactide, Polymerization, NMR, FTIR.

Citation

K. BOUA-IN, N. CHAIYUT, B. KSAPABUTR, Preparation of polylactide by ring-opening polymerisation of lactide, Optoelectronics and Advanced Materials - Rapid Communications, 4, 9, September 2010, pp.1404-1407 (2010).

Submitted at: March 9, 2010

Accepted at: Sept. 15, 2010