TITLE:
Influences of Diamines on the Morphologies and the Chemical, Thermal, and Mechanical Properties of Polyurethane-Imide Elastomers
AUTHORS:
Tomohiro Ueda, Tomohiro Nishio, Shinichi Inoue
KEYWORDS:
Polyurethane-Imide, Diisocyanate, Polyol, Diamine, Pyromellitic Dianhydride, Solution Polymerization
JOURNAL NAME:
Open Journal of Organic Polymer Materials,
Vol.7 No.4,
October
19,
2017
ABSTRACT: Polyurethane-imide elastomers (PUIEs) are formed from isocyanate, polyol,
acid anhydride, and diamine by liquid polymerization. Unfortunately, many of
the diamines have rarely been applied to the formation of PUIEs. Hence, investigating the effect of diamines on PUIEs
remains a challenge in polymer chemistry. Herein, PUIEs prepared from
4,4'-diphenylmethane diisocyanate (MDI), polytetramethylene glycol (Mw:
1000), pyromellitic dianhydride, and aromatic diamines (such as p-phenylene diamine, 4,4'-oxydianiline, and 1,3-bis(4-aminophenoxy)benzene), and aliphatic diamines (such as 1,2-ethylene diamine,
1,6-hexamethylene diamine, and 1,12-dodecamethylene diamine) were
synthesized by liquid polymerization. The morphologies and the chemical,
thermal, and mechanical properties of the various PUIEs were investigated. The
obtained elastomeric sheets were characterized in terms of the following tests
and methods: solubility and swelling tests, X-ray diffraction and differential scanning calorimetry, dynamic
mechanical analysis and thermogravimetric
analysis, tensile tests, nuclear magnetic resonance spectroscopy, infrared spectroscopy, atomic force microscopy, contact angle microscopy, and
scanning electron microscopy