scholarly journals Effects of synthesis conditions on chemical structures and physical properties of copolyesters from lactic acid, ethylene glycol and dimethyl terephthalate

2009 ◽  
Vol 3 (7) ◽  
pp. 458-468 ◽  
Author(s):  
M. Opaprakasit ◽  
A. Petchsuk ◽  
P. Opaprakasit ◽  
S. Chongprakobkit
Keyword(s):  
Lactic Acid ◽  
Ethylene Glycol ◽  
Physical Properties ◽  
Synthesis Conditions ◽  
Chemical Structures ◽  
Dimethyl Terephthalate

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.

Preparation of Poly(Lactic Acid) Acrylate for UV-Curable Coating Applications

2015 ◽  
Vol 659 ◽  
pp. 570-574 ◽  
Author(s):  
Apinya Musidang ◽  
Nantana Jiratumnukul
Keyword(s):  
Lactic Acid ◽  
Physical Properties ◽  
High Efficiency ◽  
Low Energy ◽  
Poly Lactic Acid ◽  
Coating Film ◽  
Pencil Hardness ◽  
Uv Curable ◽  
Low Energy Consumption ◽  
Volatile Organic

UV-curable process is widely used for paints, inks and adhesives due to its rapid curing, low energy consumption, high efficiency and low volatile organic compounds (VOCs). The objective of this research is to prepare poly(lactic acid) (PLA) based UV-curable coating by using glycolyzed PLA. PLA was glycolyzed by ethylene glycol (EG) at 170°C for 90 minutes. The obtained glycolyzed PLA was reacted with methacrylic anhydride (MAAH) to provide PLA acrylate oligomer. The obtained PLA acrylate oligomer was used in coating formulations with various amounts of photoinitiator and cured under UV radiation. Physical properties of cured coating film were investigated such as pencil hardness, gloss and haze. The results showed that poly(lactic acid) (PLA) based UV-curable coating provided good physical properties.

Chemical Structures of Liquid Poly(ethylene glycol)s with Different End Groups at Buried Polymer Interfaces

2006 ◽  
Vol 39 (26) ◽  
pp. 9396-9401 ◽  
Author(s):  
Mark A. Even ◽  
Chunyan Chen ◽  
Jie Wang ◽  
Zhan Chen
Keyword(s):  
Ethylene Glycol ◽  
Polymer Interfaces ◽  
Poly Ethylene Glycol ◽  
Chemical Structures ◽  
End Groups ◽  
Poly Ethylene

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

Effects of physical and chemical structures of bacterial cellulose on its enhancement to paper physical properties

Cellulose ◽  
2017 ◽  
Vol 24 (8) ◽  
pp. 3513-3523 ◽  
Author(s):  
Zhouyang Xiang ◽  
Qingguo Liu ◽  
Yong Chen ◽  
Fachuang Lu
Keyword(s):  
Physical Properties ◽  
Bacterial Cellulose ◽  
Chemical Structures ◽  
Physical And Chemical

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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