Synthesis and physicochemical properties of new (bio)degradable poly(ester-urethane)s containing polylactide and poly[(1,4-butylene terephthalate)-co-(1,4-butylene adipate)] segments

Sikorska, Wanda; Dacko, Piotr; Kaczmarczyk, Bożena; Janeczek, Henryk; Domański, Marian; Manczyk, Кrzysztof; Kowalczuk, Marek

doi:10.1016/j.polymer.2011.08.015

Cited by 11 publications

(9 citation statements)

References 52 publications

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“…The characteristic peak appeared around 3470 cm À1 belongs to the stretching vibration of hydroxyl group. 37 The signs at 1.3 and 4.08 ppm are related to the protons of lactate units, and 3.6 ppm for methylene groups of PEG moieties on LPEU chains. As for the spectra of LPEU, it is found that the wide absorption band of ANHA group appears between 3399 and 3263 cm À1 , while the characteristic peaks of amide group exhibit at 1748 and 1599 cm À1 .…”

Section: Structure and Morphology Of The La-based Intermediate And Pomentioning

confidence: 99%

Synthesis and characterization of a novel poly(ester‐urethane) containing short lactate sequences and PEG moieties

Xiao

2012

J of Applied Polymer Sci

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A novel poly(ester-urethane) with tailor-made structure was prepared by using lactic acid (LA) as starting material through a combination of two facile common reactions. First, a diol was prepared via the esterification between LA and poly(ethylene glycol) (PEG) with low molecular weight. Subsequently, the poly(ester-urethane) was synthesized through the addition polymerization of the LA-based diol and toluene 2,4-diisocyanate with 1,4-butanediol as chain extender. The structure, morphology, and properties of intermediate and the poly(ester-urethane) were analyzed with Fourier transform infrared spectroscopy, proton nuclear magnetic resonance, gel permeation chromatography (GPC), X-ray diffraction, differential scanning calorimetry, polarizing optical microscopy, and thermogravimetric analysis. The results indicated that the intermediate was a diol of conjugating quite short lactate sequences with PEG oligomer, and the structure of the poly(ester-urethane) was as expected. The thermal transition, thermal decomposition temperature, and crystallinity of the polymer samples depended on the molecular size of PEG. In vitro degradation property of the poly(ester-urethane) also relied on the molecular weight of PEG. The weight loss percentages varied from 11 to 36% after 12-days immersing in phosphate-buffer saline at 37 C.

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Section: Structure and Morphology Of The La-based Intermediate And Pomentioning

confidence: 99%

Synthesis and characterization of a novel poly(ester‐urethane) containing short lactate sequences and PEG moieties

Xiao

2012

J of Applied Polymer Sci

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“…Such a decomposition is usually accomplished by construction of a theoretical curve which is best fitted to the experimental one, employing an optimization method for this purpose (e.g. Hindeleh & Johnson, 1974, 1978Simanke et al, 2001;Wang et al, 2000;Sikorska et al, 2011). Because of the large number of parameters to be determined, the multidimensional space of solutions, and the unknown shape of the functions which describe the crystalline and amorphous components, it is one of the most difficult nonlinear optimization tasks.…”

Section: Introductionmentioning

confidence: 99%

Application of the particle swarm optimization method for the analysis of wide-angle X-ray diffraction curves of semicrystalline polymers

Rabiej

2017

J Appl Crystallogr

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The analysis of wide-angle X-ray diffraction curves of semicrystalline polymers is connected with a thorough decomposition of these curves into crystalline peaks and amorphous components. A reliable and unambiguous decomposition is the most important step in calculation of the crystallinity of polymers. This work presents a new algorithm dedicated to this aim, which is based on the particle swarm optimization (PSO) method. The PSO method is one of the most effective optimization techniques that employs a random choice as a tool for going through the solution space and searching for the global solution. The action of the PSO algorithm imitates the behaviour of a bird flock or a fish school. In the system elaborated in this work the original PSO algorithm has been equipped with several heuristics. The role of heuristics is performed by procedures which orient the search of the solution space using additional information. In this paper it is shown that this algorithm is faster to converge and more efficiently performs a multi-criterial optimization compared with other algorithms used for this purpose to date.

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“…It was found that the obtained poly(ester‐urethane)s exhibited only one T g , which indicated a one‐phase system. The T g value increases with an increase of PLA units content in the poly(ester‐urethane)s. For samples not containing of PLA units or the samples containing only a small amount of PLA units, the T g value decreased with decreasing 1,4‐butanediol content …”

Section: Introductionmentioning

confidence: 99%

PET wastes utilization in the synthesis of aliphatic–aromatic polyurethane elastomers

Mazurek

Tomczyk

Rokicki

2014

Polymers for Advanced Techs

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The presented work relates to the synthesis of polyurethane elastomers based on aliphatic–aromatic ester‐carbonate oligomerols obtained from poly(ethylene terephthalate) (PET) wastes and dimethyl carbonate as a source of carbonate units. A new method of transformation of PET waste into oligo(alkylene terephthalate)s in the alcoholysis process carried out with the use of azeotropic distillation was described and discussed. The obtained polyurethanes (PURs) exhibited excellent mechanical strength—75% higher tensile strength in comparison to that of polyurethanes based on aliphatic oligocarbonate diols, while maintaining similar elongation at break. It was confirmed that PURs maintain their elastomeric properties up to 42% concentration of aromatic units in the ester‐carbonate oligomerol when the mixture of terephthalate and isophthalate was used for the oligomerol synthesis. The new PURs also exhibited better thermal stability than those based on aliphatic carbonate oligomerols. Copyright © 2014 John Wiley & Sons, Ltd.

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Synthesis and physicochemical properties of new (bio)degradable poly(ester-urethane)s containing polylactide and poly[(1,4-butylene terephthalate)-co-(1,4-butylene adipate)] segments

Cited by 11 publications

References 52 publications

Synthesis and characterization of a novel poly(ester‐urethane) containing short lactate sequences and PEG moieties

Synthesis and characterization of a novel poly(ester‐urethane) containing short lactate sequences and PEG moieties

Application of the particle swarm optimization method for the analysis of wide-angle X-ray diffraction curves of semicrystalline polymers

PET wastes utilization in the synthesis of aliphatic–aromatic polyurethane elastomers

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