Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27086
Title: Surface degradation of poly(L-lactic acid) fibres in a concentrated alkaline solution
Authors: Yuan, X
Mak, AFT
Yao, K
Keywords: Concentrated alkaline solution
Poly(L-lactic acid) fibres
Surface degradation
Issue Date: 2003
Publisher: Elsevier
Source: Polymer degradation and stability, 2003, v. 79, no. 1, p. 45-52 How to cite?
Journal: Polymer degradation and stability 
Abstract: Surface degradation of poly(L-lactic acid) (PLLA) fibres was studied by incubating them in a concentrated NaOH solution at 37 °C for several hours. Characterization of the viscosity-average molecular weight, the mass, the morphology, the thermal behaviours and the tensile properties of the PLLA fibres were investigated. After surface degradation, the viscosity-average molecular weight of PLLA did not drop but apparently showed a slight increase. The diameter and the mass of the PLLA fibres dropped significantly. The fibres lost their surface smoothness and a regular rough topology was generated after 2.5 h of degradation. Thermal studies by differential scanning calorimetry showed that the melting temperatures of the PLLA fibres increased notably but the crystallinity did not change. The tensile properties of the PLLA fibres did not show significant changes in 1 h of degradation. After 2.5 h of degradation, the values of the tensile modulus apparently increased slightly, but the ultimate strength and the maximum elongation showed substantial decreases. The 3% offset strength did not exhibit significant changes during all the degradation. Results suggested that the degradation of PLLA fibres in the concentrated alkaline solution followed a surface erosion mechanism. The effects of degradation may be advantageous in applications where cell attachment is important.
URI: http://hdl.handle.net/10397/27086
ISSN: 0141-3910
DOI: 10.1016/S0141-3910(02)00237-9
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

46
Last Week
0
Last month
0
Citations as of Oct 9, 2017

WEB OF SCIENCETM
Citations

44
Last Week
1
Last month
Citations as of Oct 15, 2017

Page view(s)

41
Last Week
7
Last month
Checked on Oct 22, 2017

Google ScholarTM

Check

Altmetric



Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.