Development of a solid-phase extraction method for simultaneous extraction of adipic acid, succinic acid and 1,4-butanediol formed during hydrolysis of poly(butylene adipate) and poly(butylene succinate)

Lindström, Annika; Albertsson, Ann‐Christine; Hakkarainen, Minna

doi:10.1016/j.chroma.2003.09.036

Cited by 18 publications

(5 citation statements)

References 34 publications

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“…The average formula weight ratio for (MDI + BDO) over PBA is 1021:300. The average molecular weight of PBA is 10,500 g/mol . The entropy at the equilibrium configuration is calculated by eq , which is S c = 5.48 × 10 −4 J/K.…”

Section: Resultsmentioning

confidence: 99%

Structural relaxation behavior of strain hardened shape memory polymer fibers for self‐healing applications

Zhang

2013

J Polym Sci B Polym Phys

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In this study, shape-memory polyurethane (SMPU) fibers were strain hardened by cold-drawing programming (CDP) process. The programmed fibers are experimentally studied on the physical and thermomechanical properties. Structural relaxation, which determines shape memory capability of the SMP fibers, is quantified by conformational entropy change. Based on the entanglement tube theory and reptation theory, the entropic force is derived as a "bridge" to link the stress relaxation and structural relaxation, and thus structural relaxation can be evaluated by stress relaxation. It was found that the CDP SMPU fibers would still have good crackclosing capability after 13 years of hibernation in polymer matrix composite. V C 2013 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys. 2013, 51, 966-977

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Section: Resultsmentioning

confidence: 99%

Structural relaxation behavior of strain hardened shape memory polymer fibers for self‐healing applications

Zhang

2013

J Polym Sci B Polym Phys

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“…Prior to identification of degradation products by gas chromatography–mass spectrometry, extraction of formed hydrolysis products from the sample solution was carried out according to an earlier developed SPE method 31. The ISOLUTE® ENV+ column was conditioned with 1 mL of methanol and equilibrated with 1 mL of water (pH < 2).…”

Section: Methodsmentioning

confidence: 99%

“…31 The ISOLUTE 1 ENVþ column was conditioned with 1 mL of methanol and equilibrated with 1 mL of water (pH < 2). The pKa values of our expected analytes are 14.5 for 1,4-butanediol and 4.41 and 5.41 for the first and second hydroxyl group in adipic acid.…”

Section: Solid Phase Extraction Proceduresmentioning

confidence: 99%

Migration resistant polymeric plasticizer for poly(vinyl chloride)

Lindström

Hakkarainen

2007

J of Applied Polymer Sci

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Flexible films of poly(vinyl chloride) (PVC) and linear or branched poly(butylene adipate) (PBA), synthesized from 1,4-butanediol and adipic acid or dimethyl ester of adipic acid, were aged in an aqueous environment for 10 weeks to study how branching, molar mass, and end-group functionality affect the leaching of polyester plasticizer from thin films. Principal component analysis was applied to reveal patterns and correlations between mechanical properties, material characteristics, and aging behavior. Introduction of branches in the polyester structure increased the miscibility between PVC and the polyester, resulting in improved mechanical properties and lower water absorption. Methyl ester end-group in PBA polyester stabilized the polymeric plasticizer toward hydrolysis, and reduced the formation and migration of monomeric degradation products from the blends during aging in water. The combination of branched structure with methyl ester end-groups resulted in a migration resistant polymeric plasticizer.

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“…Prior to identification of degradation products by gas chromatography-mass spectrometry, extraction of formed hydrolysis products from the sample solution was carried out according to an earlier developed SPE method. 42 The ISOLUTE ENV+ column was conditioned with 1 mL of methanol and equilibrated with 1 mL of water (pH < 2). The pKa values of our expected analytes are 14.7 and 15.5 for 1,4-butanediol and 4.41 and 5.41 for adipic acid.…”

Section: Methodsmentioning

confidence: 99%

Designed Chain Architecture for Enhanced Migration Resistance and Property Preservation in Poly(vinyl chloride)/Polyester Blends

Lindström

Hakkarainen

2007

Biomacromolecules

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Blends of poly(vinyl chloride) (PVC) and poly(butylene adipate) (PBA) with varying degrees of branching were analyzed with respect to migration resistance during aging in water, preservation of material properties, and thermal stability. Gas chromatography-mass spectrometry, water absorption, weight loss, thermogravimetric analysis, Fourier transform infrared spectroscopy, contact angle, tensile testing, and differential scanning calorimetry were used to analyze the blends before and after aging in water for 6 weeks. Films plasticized with slightly branched polyester maintained their material and mechanical properties best during aging. High degree of branching was accompanied by poor miscibility, increased hydrophilicity, and polydispersity, and highly branched PBA was not favorable as a plasticizer. Strong intermolecular interactions reduced the water absorption and increased the migration resistance of the blends. Polymeric plasticizers with no, low, or moderate degree of branching improved the thermal stability of films compared to films plasticized with a traditional phthalate plasticizer. Proper design of plasticizer architecture led, thus, to improved migration resistance, long-term properties, and thermal stability in PVC/polyester blends.

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Development of a solid-phase extraction method for simultaneous extraction of adipic acid, succinic acid and 1,4-butanediol formed during hydrolysis of poly(butylene adipate) and poly(butylene succinate)

Cited by 18 publications

References 34 publications

Structural relaxation behavior of strain hardened shape memory polymer fibers for self‐healing applications

Structural relaxation behavior of strain hardened shape memory polymer fibers for self‐healing applications

Migration resistant polymeric plasticizer for poly(vinyl chloride)

Designed Chain Architecture for Enhanced Migration Resistance and Property Preservation in Poly(vinyl chloride)/Polyester Blends

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