Synthesis, Characterization, and Hydrolytic Degradation of PLA/PEO/PLA Triblock Copolymers with Short Poly(l-lactic acid) Chains

1996 ◽  
Vol 29 (1) ◽  
pp. 50-56 ◽  
Author(s):  
I. Rashkov ◽  
N. Manolova ◽  
S. M. Li ◽  
J. L. Espartero ◽  
M. Vert
Keyword(s):  
Lactic Acid ◽  
Triblock Copolymers ◽  
Hydrolytic Degradation

Synthesis, Characterization, and Hydrolytic Degradation of PLA/PEO/PLA Triblock Copolymers with Long Poly(l-lactic acid) Blocks

1996 ◽  
Vol 29 (1) ◽  
pp. 57-62 ◽  
Author(s):  
S. M. Li ◽  
I. Rashkov ◽  
J. L. Espartero ◽  
N. Manolova ◽  
M. Vert
Keyword(s):  
Lactic Acid ◽  
Triblock Copolymers ◽  
Hydrolytic Degradation

Synthesis and Properties of Biodegradable Liquid Crystalline Poly(ester-Urethane)s Based on Poly(L-Lactic Acid)

2013 ◽  
Vol 652-654 ◽  
pp. 459-462
Author(s):  
Ya Tong Guo ◽  
Zhu Zheng ◽  
Zhen Qi Hou ◽  
Jie Du
Keyword(s):  
Phase Transition ◽  
Thermal Stability ◽  
Lactic Acid ◽  
Physical Properties ◽  
Liquid Crystalline ◽  
Degradation Rate ◽  
Hydrolytic Degradation ◽  
Hexamethylene Diisocyanate ◽  
Solution Polymerization ◽  
Phase Transition Temperatures

A series of biodegradable segmented liquid crystalline poly(ester-urethane)s were prepared by solution polymerization of poly(L-lactic acid) (PLLA), mesogenic diol prepolymer poly(butylene terephthaloyldioxy dibenzoates) (MD), and hexamethylene diisocyanate (HDI). The MD content was varied from 0 to 40 mol% so that the effects of the mesogen content on the thermal and physical properties, and hydrolytic degradation were examined respectively. It was found that introducing mesogens units could increase the thermal stability and the elastic properties, while reduced the phase transition temperatures and the hydrolytic degradation rate.

Morphological behaviour of poly(lactic acid) during hydrolytic degradation

2008 ◽  
Vol 93 (10) ◽  
pp. 1964-1970 ◽  
Author(s):  
Xiaoqing Zhang ◽  
Maria Espiritu ◽  
Alex Bilyk ◽  
Lusiana Kurniawan
Keyword(s):  
Lactic Acid ◽  
Hydrolytic Degradation ◽  
Poly Lactic Acid

Effect of different mechanical recycling processes on the hydrolytic degradation of poly(l-lactic acid)

2016 ◽  
Vol 133 ◽  
pp. 339-348 ◽  
Author(s):  
F.R. Beltrán ◽  
V. Lorenzo ◽  
M.U. de la Orden ◽  
J. Martínez-Urreaga
Keyword(s):  
Lactic Acid ◽  
Hydrolytic Degradation ◽  
Mechanical Recycling

Hydrolytic degradation of PLA/PEO/PLA triblock copolymers prepared in the presence of Zn metal or CaH2

Polymer ◽  
1998 ◽  
Vol 39 (22) ◽  
pp. 5421-5430 ◽  
Author(s):  
Suming Li ◽  
Sylvie Anjard ◽  
Iliya Rashkov ◽  
Michel Vert
Keyword(s):  
Triblock Copolymers ◽  
Hydrolytic Degradation

scholarly journals Structure and performance analysis of flatter ribbon-like electrospun poly(L-lactic acid)/graphene oxide nanofiber webs

2020 ◽  
Vol 15 ◽  
pp. 155892502095292
Author(s):  
Hui Ma ◽  
Huanxia Zhang ◽  
Dongsheng Wang ◽  
Xiangyu Zeng ◽  
Jie Yi ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lactic Acid ◽  
Tensile Stress ◽  
High Performance ◽  
Stress Test ◽  
Hydrolytic Degradation ◽  
Average Diameter ◽  
Electrospinning Technique ◽  
Sem Image ◽  
And Performance

Polylactic acid matrix composites are widely used in packagings and biomaterials. The specific surface area, flexibility and degradation efficiency of the material are the key factors to determine its application in these fields. In this study, a series of poly(L-lactic acid) (PLLA)/graphene oxide (GO) composite nanofiber webs were prepared using electrospinning technique. The scanning electron microscope (SEM) image of PLLA/GO nanofibers showed a rougher surface and a smaller average diameter compared with that of pure PLLA nanofibers, and the nanofibers with 6 wt% GO in PLLA matrix looked like flatter ribbon. Accordingly, the tensile stress test of the electrospun webs with different GO contents showed high performance, 400% increment in the tensile stress at presence of 6 wt% GO. The hydrolytic degradation behavior of composite the nanofiber webs exhibited that the presence of GOs greatly improved the degradation rate, after 9 days, the degradation ratio of PLLA/GO can reach 16.83%. of the PLLA matrix, resulting from the better hydrophilic property and absorbability. Using GO to improve the preparation of new biocompatible materials from PLLA can provide a reference for problems in the field of packaging materials.

Synthesis and hydrolytic degradation of graft copolymers containing poly(lactic acid) side chains

2002 ◽  
Vol 76 (3) ◽  
pp. 411-417 ◽  
Author(s):  
Valérie Langlois ◽  
Karine Vallee-Rehel ◽  
Jean Jacques Peron ◽  
Alain le Borgne ◽  
Michael Walls ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Graft Copolymers ◽  
Hydrolytic Degradation ◽  
Poly Lactic Acid ◽  
Side Chains

Comparative study on hydrolytic degradation and monomer recovery of poly(l-lactic acid) in the solid and in the melt

2008 ◽  
Vol 93 (10) ◽  
pp. 1956-1963 ◽  
Author(s):  
Hideto Tsuji ◽  
Takashi Saeki ◽  
Takayuki Tsukegi ◽  
Hiroyuki Daimon ◽  
Koichi Fujie
Keyword(s):  
Lactic Acid ◽  
Comparative Study ◽  
Hydrolytic Degradation
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