Fully biobased biodegradable poly( l ‐lactide)‐ b ‐poly(ethylene brassylate)‐ b ‐poly( l ‐lactide) triblock copolymers: synthesis and investigation of relationship between crystallization morphology and thermal properties

2020 ◽  
Vol 69 (4) ◽  
pp. 363-372 ◽  
Author(s):  
Chenhao Jin ◽  
Xuefei Leng ◽  
Manwen Zhang ◽  
Yanshai Wang ◽  
Zhiyong Wei ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Triblock Copolymers ◽  
Crystallization Morphology ◽  
Biodegradable Poly ◽  
Poly Ethylene

scholarly journals Studies on Chemical IR Images of Poly(hydroxybutyrate–co–hydroxyhexanoate)/Poly(ethylene glycol) Blends and Two-Dimensional Correlation Spectroscopy

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 507 ◽  
Author(s):  
Yeonju Park ◽  
Sila Jin ◽  
Yujeong Park ◽  
Soo Kim ◽  
Isao Noda ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Thermal Properties ◽  
Ethylene Glycol ◽  
Correlation Spectroscopy ◽  
Two Dimensional ◽  
Poly Ethylene Glycol ◽  
Biodegradable Poly ◽  
Poly Ethylene ◽  
Increasing Temperature ◽  
Kinetics Of

Biodegradable poly-[(R)-3-hydroxybutyrate-co-(R)-3-hydroxyhexanoates] (PHBHx) have been widely studied for their applications in potentially replacing petroleum-based thermoplastics. In this study, the effect of the high molecular weight (Mn = 3400) poly(ethylene glycol) (PEG) blended in the films of PHBHx with different ratios of PEG was investigated using chemical FTIR imaging. Chemical IR images and FTIR spectra measured with increasing temperature revealed that PEG plays an important role in changing the kinetics of PHBHx crystallization. In addition, two-dimensional correlation spectra clearly showed that thermal properties of PHBHx/PEG blend film changed when the blending ratio of PHBHx/PEG were 60/40 and 50/50. Consequently, PEG leads to changes in the thermal behavior of PHBHx copolymers.

Flexible plasticized PLA with high crystallinity obtained by controlling the annealing temperature

e-Polymers ◽  
2010 ◽  
Vol 10 (1) ◽  
Author(s):  
Xiang-Hai Ran ◽  
Zhi-Yuan Jia ◽  
Yu-Ming Yang ◽  
Li-Song Dong
Keyword(s):  
Thermal Properties ◽  
Ethylene Glycol ◽  
Annealing Temperature ◽  
Tensile Tests ◽  
Poly Ethylene Glycol ◽  
Elongation At Break ◽  
Crystallization Morphology ◽  
The Difference ◽  
Poly Ethylene ◽  
High Flexibility

AbstractIn this study, plasticized polylactide (PLA) was prepared by blending PLA with high stereoregularity and poly(ethylene glycol-co-propylene glycol) (PEPG) in a batch wise mixer and pressed into films. The influence of annealing temperature on the thermal properties and tensile properties of quenched plasticized PLA was investigated by DSC, DMA and tensile tests. It was found that plasticized PLA after cold crystallization can keep its high flexibility with an elongation at break over 300% by choosing a proper annealing temperature. The difference of crystallization morphology formed at the different annealing temperature was thought as a possible reason for this result.

Poly(lactide)-Poly(ethylene oxide)-Poly(lactide) Triblock Copolymers: Synthesis and Thermal Properties

2006 ◽  
pp. 156-167
Author(s):  
Naomi Sanabria-DeLong ◽  
Khaled A. Aamer ◽  
Sarvesh K. Agrawal ◽  
Surita R. Bhatia ◽  
Gregory N. Tew
Keyword(s):  
Thermal Properties ◽  
Ethylene Oxide ◽  
Triblock Copolymers ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Preparation of Fully Biodegradable Poly(L-lactide) and Poly(ethylene succinate) Blend and its Crystallization Property

2011 ◽  
Vol 393-395 ◽  
pp. 1363-1366
Author(s):  
Xin Fan
Keyword(s):  
Weight Ratio ◽  
Crystallization Rate ◽  
Optical Microscope ◽  
Aliphatic Polyesters ◽  
Crystallization Property ◽  
Crystallization Morphology ◽  
Biodegradable Poly ◽  
Lower Heating Rate ◽  
Poly Ethylene ◽  
Lower Heating

Both poly(L-lactide) (PLLA) and poly(ethylene succinate) (PES) are biodegradable synthetic aliphatic polyesters with excellent biocompatibility. They are semicrystalline thermoplastic polymers processed by most conventional processing methods. In view of their complementary properties, blending PLLA with PES becomes a promising approach to improve the properties of PLLA without compromising its biodegradability. In the present work, fully biodegradable PLLA/PES blend(the weight ratio 90/10) was melt-blended in stainless steel chamber. The crystallization morphology was investigated using a polarized optical microscope (POM), showing more clear spherulites with typical crosslink extinction patterns and faster crystallization rate of PLLA in blend at the lower heating rate. It clearly showed that the addition of PES largely increased the crystallization rate of PLLA and improved the crystallinity of PLLA in blends.

Crystallization behavior and thermal properties of biodegradable poly(L-lactide)-poly(ethylene glycol) block copolymers

2013 ◽  
Vol 28 (8) ◽  
pp. 1111-1117 ◽  
Author(s):  
Hsin-Jiant Liu ◽  
Hawn-Chung Chu ◽  
Li-Huei Lin ◽  
Jia-He Wu
Keyword(s):  
Thermal Properties ◽  
Block Copolymers ◽  
Ethylene Glycol ◽  
Crystallization Behavior ◽  
Poly Ethylene Glycol ◽  
Biodegradable Poly ◽  
Poly Ethylene ◽  
Image Position

Abstract

Preparation and Characterization of Polypseudorotaxanes Based on Biodegradable Poly(l-lactide)/Poly(ethylene glycol) Triblock Copolymers

2003 ◽  
Vol 36 (25) ◽  
pp. 9313-9318 ◽  
Author(s):  
Hak Soo Choi ◽  
Tooru Ooya ◽  
Shintaro Sasaki ◽  
Nobuhiko Yui ◽  
Yuichi Ohya ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Triblock Copolymers ◽  
Poly Ethylene Glycol ◽  
Biodegradable Poly ◽  
Poly Ethylene

Synthesis and self-assembly behaviour of poly(Nα-Boc-l-tryptophan)-block-poly(ethylene glycol)-block-poly(Nα-Boc-l-tryptophan)

RSC Advances ◽  
2016 ◽  
Vol 6 (29) ◽  
pp. 24142-24153
Author(s):  
Andreea S. Voda ◽  
Kevin Magniez ◽  
Nisa V. Salim ◽  
Cynthia Wong ◽  
Qipeng Guo
Keyword(s):  
Drug Delivery ◽  
Ethylene Glycol ◽  
Self Assembly ◽  
Triblock Copolymers ◽  
Potential Drug ◽  
Poly Ethylene Glycol ◽  
Drug Delivery Applications ◽  
Poly Ethylene ◽  
First Time

We report for the first time the use of Nα-Boc-l-tryptophan for the synthesis of amphiphilic BAB triblock copolymers for potential drug delivery applications.

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