News Column

Researchers at Chulalongkorn University Report New Data on Polymer Engineering

June 18, 2014



By a News Reporter-Staff News Editor at Journal of Engineering -- Current study results on Polymer Engineering have been published. According to news originating from Bangkok, Thailand, by VerticalNews correspondents, research stated, "Nanofibers of poly(L-lactide-co-DL-Lactide) (PDLLA(x)) copolymers with DL-lactate (DLLA) contents of 0, 2.5, 7.5, and 50%, which exhibit strong structure/properties correlation, were fabricated by electrospinning. Effect of the copolymer structure and electrospinning conditions on morphology and properties of the fibers were examined by SEM, DSC, XRD, and tensile measurements."

Our news journalists obtained a quote from the research from Chulalongkorn University, "Bead-free fibers of PDLLA(x) prepared from a DMF/CHCl3 mixed solvent are roughly 10-times smaller in size (600-800 nm), with lower degree of surface porosity, compared to those of CHCl3. When CHCl3 is employed, an increase in size (2.4-5.5 mu m) and surface porosity (0-45%) with relative humidity value is observed in crystallizable copolymers, whereas an amorphous copolymer shows a reverse trend. Thermal properties and chain arrangements of the electrospun fibers are critically affected by DLLA content of the copolymers and electrospinning conditions, as a result from interplay between intermolecular and intramolecular hydrogen bonding. Contents of crystalline domains and 'physical crosslinks' generated from DL lactate segments are proposed as the origin of this phenomenon."

According to the news editors, the research concluded: "Fiber mats of PDLLA with 50% DLLA content show a large improvement in all aspects of mechanical properties, which are suitable for various biomedical applications. POLYM. ENG. SCI., 54:472-480, 2014."

For more information on this research see: Electrospinning of poly(l-lactide-co-dl-lactide) copolymers: Effect of chemical structures and spinning conditions. Polymer Engineering and Science, 2014;54(2):472-480. Polymer Engineering and Science can be contacted at: Wiley-Blackwell, 111 River St, Hoboken 07030-5774, NJ, USA. (Wiley-Blackwell - www.wiley.com/; Polymer Engineering and Science - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1548-2634)

The news correspondents report that additional information may be obtained from C. Thammawong, Chulalongkorn University, Dept. of Mat Sci, Fac Sci, Bangkok 10330, Thailand. Additional authors for this research include S. Buchatip, A. Petchsuk, P. Tangboriboonrat, N. Chanunpanich, M. Opaprakasit, P. Sreearunothai and P. Opaprakasit.

Keywords for this news article include: Asia, Bangkok, Thailand, Polymer Engineering

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Source: Journal of Engineering


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