Studies of the hydrolytic stability of poly(urethane–urea) elastomers synthesized from oligocarbonate diols

Kozakiewicz, Janusz; Rokicki, Gabriel; Przybylski, Jarosław; Sylwestrzak, Krystyna; Parzuchowski, Paweł G.; Tomczyk, Karolina M.

doi:10.1016/j.polymdegradstab.2010.08.017

Cited by 28 publications

(21 citation statements)

References 23 publications

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“…In our earlier studies we have shown, that carbonate linkages lead to polyurethanes with resistance to hydrolysis as well as enzymatic degradation …”

Section: Introductionmentioning

confidence: 96%

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Influence of the soft segment length on the properties of water‐cured poly(carbonate‐urethane‐urea)s

Mazurek

Tomczyk

Auguścik

et al. 2014

Polymers for Advanced Techs

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a Poly(carbonate-urethane-urea)s (PCUU) based on oligocarbonate diols (M n ≈ 2000) with different length of the hydrocarbon chain as soft segments were synthesized and investigated. Carbonate oligomerols were obtained in a two-step method from dimethyl carbonate (DMC) and linear α,ω-diols (1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,9-nonanediol, 1,10-dekanediol and 1,12-dodecanediol). Oligo(trimethylene carbonate) diol was synthesized using ring-opening polymerization of trimethylence carbonate. PCUUs were obtained by prepolymer method using isophorone diisocyanate (IPDI) and water as a chain extender. Changes in polymers properties with increase of methylene group number between carbonate linkages were investigated by differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), tensile strength and hardness measurements. The thermal stability was also analyzed by means of thermogravimetric analysis (TGA). Based on FTIR analysis influence of methylene groups number between carbonate linkages on phase separation and concentration of allophanate and biuret groups in the samples were investigated. The obtained poly(carbonate-urethane-urea)s exhibited very good mechanical properties. Tensile strength and elongation at break were 40 MPa and 400-600%, respectively, depending on the oligocarbonate used.

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“…In our earlier studies we have shown, that carbonate linkages lead to polyurethanes with resistance to hydrolysis as well as enzymatic degradation …”

Section: Introductionmentioning

confidence: 96%

“…Poly(ester‐urethane)s are prone to hydrolytic degradation and are not used in devices designed for long‐term implantation . Recently, poly(carbonate‐urethane)s have replaced poly(ether‐urethane)s in long‐term biostable devices because of their higher resistance to hydrolysis, oxidation and ultraviolet radiation …”

Section: Introductionmentioning

confidence: 99%

Influence of the soft segment length on the properties of water‐cured poly(carbonate‐urethane‐urea)s

Mazurek

Tomczyk

Auguścik

et al. 2014

Polymers for Advanced Techs

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“…PUR-2 had the highest hydrolysis resistance degree because of the CNSL based polyester diol contain aromaticity and long aliphatic chain delivers hydrolytic stability. The addition of polycarbonate diols in the PURHs, PUR-4 showed lower retention of tensile strength than PUR-5 after hydrolysis ageing; the lower degree of hydrolytic stability mainly due to the higher concentration of carbonate group of PPC diol which result from the shorter carbon chain in the repeating unit (45).…”

Section: Hydrolysis Resistance Test Of Purhs Film and Purhs Adhesive mentioning

confidence: 94%

Synthesis, characterization and properties of biomass and carbon dioxide derived polyurethane reactive hot-melt adhesives

2019

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Polyurethane reactive hot-melt adhesives (PURHs) are frequently employed in industries; however, there is still a need to develop more sustainable and versatile methodologies to expand the functions and fabrication of these important materials. Renewable feedstock can give PURHs with new functions, and reduce environmental impact. This study focuses on synthesizing PURHs using polyols derived from biomass (plants) and greenhouse gas (CO 2 ) resources. These PURHs were characterized by multiple techniques, including solid-state 13 C nuclear magnetic resonance (NMR), a dynamic mechanical analysis (DMA), single-lap adhesive joints strength of stainless steel, and hydrolytic ageing. The PURH film based on biomass poly(tetramethylene ether) glycol (bio-PTMEG) exhibited better water vapor permeability, tensile strength, and adhesive joints properties than PURHs based on cashew nutshell liquid (CNSL) polyester diol and poly(propylene carbonate)-poly(propylene glycol) (PPC-PPG) copolymer diol. The polyols blend of bio-PTMEG with biomass and CO 2 based polycarbonate diols respectively provided PURHs films excellent hydrolysis resistance and adhesive strength on single-lap adhesively bonded stainless steel specimens. The work herein demonstrates that various renewable polyols can be employed in a sustainable fashion to optimize the structures and properties of PURHs for important applications.Abstract: Let F denote a eld and let V denote a vector space over F with nite positive a pair A, A * of diagonalizable F-linear maps on V, each of which acts on an eigenbasis irreducible tridiagonal fashion. Such a pair is called a Leonard pair. We consider the s there exists an automorphism of the endomorphism algebra of V that swaps A and A * . S is unique, and called the duality A ↔ A * . In the present paper we give a comprehens duality. In particular, we display an invertible F-linear map T on V such that the map X → A ↔ A * . We express T as a polynomial in A and A * . We describe how T acts on ag and 24 bases for V.

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“…Polyurethanes based on aliphatic–aromatic oligo(ester‐carbonate) diols were synthesized by prepolymer method using water vapor as a chain extender …”

Section: Methodsmentioning

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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Studies of the hydrolytic stability of poly(urethane–urea) elastomers synthesized from oligocarbonate diols

Cited by 28 publications

References 23 publications

Influence of the soft segment length on the properties of water‐cured poly(carbonate‐urethane‐urea)s

Influence of the soft segment length on the properties of water‐cured poly(carbonate‐urethane‐urea)s

Synthesis, characterization and properties of biomass and carbon dioxide derived polyurethane reactive hot-melt adhesives

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

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