Effect of molecular weight on spherulitic growth rate of poly(ε-caprolactone) and poly(ε-caprolactone)-b-poly(ethylene glycol)

2007 ◽  
Vol 104 (5) ◽  
pp. 2986-2991 ◽  
Author(s):  
Zi-Xiu Du ◽  
Yong Yang ◽  
Jun-Ting Xu ◽  
Zhi-Qiang Fan
Keyword(s):  
Molecular Weight ◽  
Growth Rate ◽  
Ethylene Glycol ◽  
Poly Ethylene Glycol ◽  
Spherulitic Growth ◽  
Spherulitic Growth Rate ◽  
Poly Ethylene

Hydrolytically and Reductively Degradable High-Molecular-Weight Poly(ethylene glycol)s

2007 ◽  
Vol 208 (24) ◽  
pp. 2642-2653 ◽  
Author(s):  
Alena Braunová ◽  
Michal Pechar ◽  
Richard Laga ◽  
Karel Ulbrich
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
High Molecular Weight ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene ◽  
High Molecular Weight Poly

Microporous Bio-Membrane Materials Based on High Molecular Weight Polylactide and Low Molecular Weight Poly(ethylene glycol)

2012 ◽  
Vol 567 ◽  
pp. 123-126
Author(s):  
Teng Fei Shen ◽  
Man Geng Lu ◽  
Li Yan Liang
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
High Weight ◽  
Low Molecular Weight ◽  
Poly Ethylene Glycol ◽  
Degradation Rates ◽  
Degradation Behaviors ◽  
The Mean ◽  
Poly Ethylene ◽  
Lower Glass Transition Temperature

In this work, microporous membrane biomaterials based on high weight molecular polylactide (PLA) and low molecular weight poly(ethylene glycol) (PEG) using rapid solvent evaporation method were prepared and investigated. The effect of PEG segments added on the thermal and degradation behaviors was studied. According to the results, produced PLA/PEG biomaterial has lower glass transition temperature (Tg)in comparison with neat PLA. It was also found that the degradation rates of the PLA/PEG biomaterials were significantly increased with adding of PEG, which explained by increasing hydrophilic groups. For better porous fixation, CL-blocked polyisocyanate (CL-bp), which was synthesized from reaction of isophorone diisocyanate (IPDI) with dimethylol propionic acid (DMPA) and Trimethylolpropane (TMP) followed by addition of caprolactam (CL), were introduced. The microporous forms were observed by the scanning electron microscope (SEM), which showed the mean diameters of prepared PLA/PEG microporous were around 10μm.

Plasticization of poly(lactide) with blends of tributyl citrate and low molecular weight poly(d,l-lactide)-b-poly(ethylene glycol) copolymers

2009 ◽  
Vol 45 (10) ◽  
pp. 2839-2848 ◽  
Author(s):  
Yahia Lemmouchi ◽  
Marius Murariu ◽  
Ana Margarida Dos Santos ◽  
Allan J. Amass ◽  
Etienne Schacht ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Ethylene Glycol ◽  
Low Molecular Weight ◽  
Poly Ethylene Glycol ◽  
Poly Ethylene
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