Synthesis and thermal stability of polyurethane using L-ascorbic acid

Takashi Akutagawa; Ken Kojio; Mutsuhisa Furukawa

Synthesis and thermal stability of polyurethane using L-ascorbic acid

Takashi Akutagawa, Ken Kojio, Mutsuhisa Furukawa

Research output: Contribution to conference › Paper

Abstract

The purpose of this study is the improvement of thermal stability of the polyurethane elastmers (PUEs) by introduction of L-Ascorbic acid (L-As). The PUEs were prepared from poly(oxytetramethylene) glycol (PTMG: M̄_n=2017), and 4,4'-diphenylmethane diisocyanate (MDI), ethylene glycol (EG) or mixture of L-As and EG (0:100 25:75 33:66 50:50 wt%) as a curing agent by a prepolymer method. Density, hardness, aggregation structure, molecular mobility and thermal stability were investigated by measuring FT-IR, ¹H-pulsed NMR, thermal and dynamic viscoelastic properties. After thermal deterioration, density, hardness and dynamic storage modulus of rubbery plateau region of the PUEs decreased. With increasing L-As content, those magnitudes for the PUEs did not show large differences before and after thermal deterioration. These results clearly suggest that the L-As act as an oxidation inhibitor in the PUEs.

Original language	English
Number of pages	1
Publication status	Published - Dec 1 2005
Externally published	Yes
Event	54th SPSJ Annual Meeting 2005 - Yokohama, Japan Duration: May 25 2005 → May 27 2005

Other

Other	54th SPSJ Annual Meeting 2005
Country	Japan
City	Yokohama
Period	5/25/05 → 5/27/05

All Science Journal Classification (ASJC) codes

Engineering(all)

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Akutagawa, T., Kojio, K., & Furukawa, M. (2005). Synthesis and thermal stability of polyurethane using L-ascorbic acid. Paper presented at 54th SPSJ Annual Meeting 2005, Yokohama, Japan.

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abstract = "The purpose of this study is the improvement of thermal stability of the polyurethane elastmers (PUEs) by introduction of L-Ascorbic acid (L-As). The PUEs were prepared from poly(oxytetramethylene) glycol (PTMG: {\=M}n=2017), and 4,4'-diphenylmethane diisocyanate (MDI), ethylene glycol (EG) or mixture of L-As and EG (0:100 25:75 33:66 50:50 wt%) as a curing agent by a prepolymer method. Density, hardness, aggregation structure, molecular mobility and thermal stability were investigated by measuring FT-IR, 1H-pulsed NMR, thermal and dynamic viscoelastic properties. After thermal deterioration, density, hardness and dynamic storage modulus of rubbery plateau region of the PUEs decreased. With increasing L-As content, those magnitudes for the PUEs did not show large differences before and after thermal deterioration. These results clearly suggest that the L-As act as an oxidation inhibitor in the PUEs.",

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AU - Akutagawa, Takashi

AU - Kojio, Ken

AU - Furukawa, Mutsuhisa

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The purpose of this study is the improvement of thermal stability of the polyurethane elastmers (PUEs) by introduction of L-Ascorbic acid (L-As). The PUEs were prepared from poly(oxytetramethylene) glycol (PTMG: M̄n=2017), and 4,4'-diphenylmethane diisocyanate (MDI), ethylene glycol (EG) or mixture of L-As and EG (0:100 25:75 33:66 50:50 wt%) as a curing agent by a prepolymer method. Density, hardness, aggregation structure, molecular mobility and thermal stability were investigated by measuring FT-IR, 1H-pulsed NMR, thermal and dynamic viscoelastic properties. After thermal deterioration, density, hardness and dynamic storage modulus of rubbery plateau region of the PUEs decreased. With increasing L-As content, those magnitudes for the PUEs did not show large differences before and after thermal deterioration. These results clearly suggest that the L-As act as an oxidation inhibitor in the PUEs.

AB - The purpose of this study is the improvement of thermal stability of the polyurethane elastmers (PUEs) by introduction of L-Ascorbic acid (L-As). The PUEs were prepared from poly(oxytetramethylene) glycol (PTMG: M̄n=2017), and 4,4'-diphenylmethane diisocyanate (MDI), ethylene glycol (EG) or mixture of L-As and EG (0:100 25:75 33:66 50:50 wt%) as a curing agent by a prepolymer method. Density, hardness, aggregation structure, molecular mobility and thermal stability were investigated by measuring FT-IR, 1H-pulsed NMR, thermal and dynamic viscoelastic properties. After thermal deterioration, density, hardness and dynamic storage modulus of rubbery plateau region of the PUEs decreased. With increasing L-As content, those magnitudes for the PUEs did not show large differences before and after thermal deterioration. These results clearly suggest that the L-As act as an oxidation inhibitor in the PUEs.

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