Degradation of poly(D,L-lactic acid)-b-poly(ethylene glycol) copolymer and poly(L-lactic acid) by electron beam irradiation

2010 ◽  
Vol 120 (1) ◽  
pp. 509-517 ◽  
Author(s):  
Peikai Miao ◽  
Dimeng Wu ◽  
Ke Zeng ◽  
Chun'e Zhao ◽  
Guoliang Xu ◽  
...  
Keyword(s):  
Electron Beam ◽  
Lactic Acid ◽  
Ethylene Glycol ◽  
Electron Beam Irradiation ◽  
Beam Irradiation ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene

Modification of poly(D,L-lactic acid)-co-poly(ethylene glycol) copolymer by low energy electron beam (EB) radiation

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Peikai Miao ◽  
Dimeng Wu ◽  
Chun’e Zhao ◽  
Guoliang Xu ◽  
Ke Zeng ◽  
...  
Keyword(s):  
Electron Beam ◽  
Lactic Acid ◽  
Ethylene Glycol ◽  
Low Energy ◽  
Energy Electron ◽  
Poly Ethylene Glycol ◽  
Elongation At Break ◽  
Melt Polycondensation ◽  
Low Energy Electron ◽  
Poly Ethylene

AbstractPoly(D,L-lactic acid)-co-poly(ethylene glycol) copolymer (D,L-PLEG) synthesized by melt polycondensation was irradiated using low energy electron beam (EB) in the presence of triallyl cyanurate (TAC) and tetraallyl pentaerythritol (TAPE) as crosslinking agents. The tensile strength of D,L-PLEG/TAC and D,L-PLEG/TAPE samples increases up to 48 MPa and 28 MPa at dose of 80 kGy and 60 kGy, respectively, and decreases with further increase of dose, whereas the elongation at break decreases continuously with increasing dose. The glass transition temperature (Tg) is improved to some extent due to the formation of molecular chain network. Degradation of D,L-PLEG is retarded with introduction of cross-linked network. The results suggest that the physical properties of crosslinked D,L-PLEG can be adjusted easily by varying irradiation dose.

Degradation of poly(D,L-lactic acid)-b-poly(ethylene glycol)-b-poly(D,L-lactic acid) copolymer by electron beam radiation

2009 ◽  
Vol 112 (5) ◽  
pp. 2981-2987 ◽  
Author(s):  
Peikai Miao ◽  
Chun'e Zhao ◽  
Guoliang Xu ◽  
Qiang Fu ◽  
Wenrui Tang ◽  
...  
Keyword(s):  
Electron Beam ◽  
Lactic Acid ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Beam Radiation ◽  
Electron Beam Radiation ◽  
Acid Copolymer ◽  
Poly Ethylene

scholarly journals Characterization of Electron Beam Irradiated Poly Vinyl Alcohol/Poly Ethylene Glycol Blends

2013 ◽  
Vol 6 (1) ◽  
pp. 29-42 ◽  
Author(s):  
Z. I. Ali ◽  
W. H. Eisa
Keyword(s):  
Electron Beam ◽  
Ethylene Glycol ◽  
Vinyl Alcohol ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Volume Ratio ◽  
Poly Vinyl Alcohol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Swelling Volume

Poly vinyl alcohol (PVA) and poly ethylene glycol (PEG) blends were prepared and irradiated with different electron beam irradiation doses. The influence of the irradiation dose, and PEG content on the physico-chemical properties was investigated. The data regarding gel content demonstrated that the radiation-induced crosslinking of PVA and PVA/PEG samples increased as a result of increasing irradiation dose and decreasing PEG content. The swelling volume ratio shows an opposite behavior. The XRD parameters (crystllinity percent and d-spacing values) show a decreasing behavior for PVA and PVA/PEG blends as a result of either irradiation or blending PVA matrix with PEG. The DSC data illustrate a decreasing trend in melting point, glass transition temperature, and degree of crystallinity with increasing irradiation dose or PEG content.  Keywords: Poly vinyl alcohol (PVA); Poly ethylene glycol (PEG); PVA/PEG blends; Electron beam irradiation; Swelling volume ratio; Gel content; Structural characterization  © 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved  doi: http://dx.doi.org/10.3329/jsr.v6i1.13071 J. Sci. Res. 6 (1), 29-42 (2014) 

The effect of poly(ethylene glycol) as plasticizer in blends of poly(lactic acid) and poly(butylene succinate)

2015 ◽  
Vol 133 (8) ◽  
pp. n/a-n/a ◽  
Author(s):  
Weraporn Pivsa-Art ◽  
Kazunori Fujii ◽  
Keiichiro Nomura ◽  
Yuji Aso ◽  
Hitomi Ohara ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Butylene Succinate ◽  
Poly Ethylene

scholarly journals Modeling of the Degradation of Poly(ethylene glycol)-co-(lactic acid)-dimethacrylate Hydrogels

2017 ◽  
Vol 50 (14) ◽  
pp. 5527-5538 ◽  
Author(s):  
Vincent E. G. Diederich ◽  
Thomas Villiger ◽  
Giuseppe Storti ◽  
Marco Lattuada
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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