Effect of polypeptide block length on nano-assembly morphology and thermo-sensitivity of methyl poly (ethylene glycol)-poly (L-valine) copolymer aqueous solutions

2019 ◽  
Vol 92 (3) ◽  
pp. 618-627 ◽  
Author(s):  
Hongyu Zhu ◽  
Meng Zhu ◽  
Shirong Shuai ◽  
Cong Zhao ◽  
Yu Liu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Block Length ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
Thermo Sensitivity

A2BA2Block Copolymers of Poly(N-isopropylacrylamide) (A) and Poly(ethylene glycol) (B): Synthesis and Thermal Gelation Properties of Aqueous Solutions

2010 ◽  
Vol 48 (2) ◽  
pp. 177-185 ◽  
Author(s):  
Mircea Teodorescu ◽  
Ioana Negru ◽  
Paul O. Stanescu ◽  
Constantin Drăghici ◽  
Anamaria Lungu ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Poly Ethylene Glycol ◽  
Thermal Gelation ◽  
Poly Ethylene

Volumetric study of aqueous solutions of poly(ethylene glycol) from 283.15 to 313.15 K and at 0.1 MPa

2003 ◽  
Vol 91 (4) ◽  
pp. 2685-2689 ◽  
Author(s):  
Raphael Da C. Cruz ◽  
Rosana J. Martins ◽  
M�rcio J. E. De M. Cardoso ◽  
Oswaldo E. Barcia
Keyword(s):  
Ethylene Glycol ◽  
Aqueous Solutions ◽  
Poly Ethylene Glycol ◽  
Volumetric Study ◽  
Poly Ethylene

Mechanical properties and hydrolytic degradation of methoxy poly(ethylene glycol)-b-poly(DL-lactide-coglycolide- co-ε-caprolactone) diblock copolymer films

e-Polymers ◽  
2008 ◽  
Vol 8 (1) ◽  
Author(s):  
Nongnit Morakot ◽  
Jirasak Threeprom ◽  
Yodthong Baimark
Keyword(s):  
Mechanical Properties ◽  
Weight Loss ◽  
Ethylene Glycol ◽  
Diblock Copolymers ◽  
Hydrolytic Degradation ◽  
Size Exclusion ◽  
Block Length ◽  
Poly Ethylene Glycol ◽  
Scanning Calorimetry ◽  
Poly Ethylene

AbstractBiodegradable films of methoxy poly(ethylene glycol)-b-poly(DL-lactideco- glycolide-co-ε-caprolactone) diblock copolymers (MPEG-b-PDLLGCL) were prepared by solution casting method. Effects of MPEG block length and DLL:G:CL ratio of the MPEG-b-PDLLGCL films on their mechanical properties and hydrolytic degradation were studied and discussed. It was found that the mechanical properties of films were strongly dependent on glass transition temperatures (Tg) of the diblock copolymers. The hydrolytic degradation was investigated in phosphatebuffered solution at 37°C. The degraded films were characterized using gravimetry (%water uptake and %weight loss), 1H-NMR spectroscopy, differential scanning calorimetry and size exclusion chromatography. The %weight loss of the degraded films increased and molecular weight decreased on increasing the MPEG block length and incorporating the G and CL units, according to their %water uptakes. The MPEG content of the degraded film decreased and the Tg increased with hydrolytic degradation time.

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