Materials 2010, 3(12), 5097-5110; doi:10.3390/ma3125097
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Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment

1 Materials Science and Engineering Department, Faculty of Engineering, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan 2 Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan 3 Materials and Science Department, Graduate School of Science and Technology, Nagasaki University, 1-14 Bunkyo-machi, Nagasaki 852-8521, Japan
* Author to whom correspondence should be addressed.
Received: 25 October 2010; in revised form: 19 November 2010 / Accepted: 29 November 2010 / Published: 1 December 2010
(This article belongs to the Special Issue Thermoplastic Elastomers)
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Abstract: Mechanical properties of thermoplastic polyurethane elastomers based on either polyether or polycarbonate (PC)-glycols, 4,4’-dipheylmethane diisocyanate (1,1’-methylenebis(4-isocyanatobenzene)), 1,4-butanediol, were controlled by restriction of crystallization of polymer glycols. For the polyether glycol based-polyurethane elastomers (PUEs), poly(oxytetramethylene) glycol (PTMG), and PTMG incorporating dimethyl groups (PTG-X) and methyl side groups (PTG-L) were employed as a polymer glycol. For the PC-glycol, the randomly copolymerized PC-glycols with hexamethylene (C6) and tetramethylene (C4) units between carbonate groups with various composition ratios (C4/C6 = 0/100, 50/50, 70/30 and 90/10) were employed. The degree of microphase separation and mechanical properties of both the PUEs were investigated using differential scanning calorimetry, dynamic viscoelastic property measurements and tensile testing. Mechanical properties could be controlled by changing the molar ratio of two different monomer components.
Keywords: thermoplastic polyurethane elastomer; crystallization; microphase separation; mechanical properties

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MDPI and ACS Style

Kojio, K.; Furukawa, M.; Nonaka, Y.; Nakamura, S. Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment. Materials 2010, 3, 5097-5110.

AMA Style

Kojio K, Furukawa M, Nonaka Y, Nakamura S. Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment. Materials. 2010; 3(12):5097-5110.

Chicago/Turabian Style

Kojio, Ken; Furukawa, Mutsuhisa; Nonaka, Yoshiteru; Nakamura, Sadaharu. 2010. "Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment." Materials 3, no. 12: 5097-5110.

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