Next Article in Journal
Calcium Phosphate Bone Cements Including Sugar Surfactants: Part Two—Injectability, Adhesive Properties and Biocompatibility
Previous Article in Journal
Volumetrical Characterization of Sheet Molding Compounds
Materials 2010, 3(12), 5097-5110; doi:10.3390/ma3125097
Review

Control of Mechanical Properties of Thermoplastic Polyurethane Elastomers by Restriction of Crystallization of Soft Segment

1,* , 2
, 3 and 3
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 / Revised: 19 November 2010 / Accepted: 29 November 2010 / Published: 1 December 2010
(This article belongs to the Special Issue Thermoplastic Elastomers)
Download PDF [801 KB, uploaded 1 December 2010]

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 thermoplastic polyurethane elastomer; crystallization; microphase separation; mechanical properties
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Export to BibTeX |
EndNote


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.

View more citation formats

Article Metrics

Comments

Citing Articles

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert