Effect of Chain Extender on Phase Mixing and Coating Properties of Polyurethane Ureas
IR@IICT: CSIR-Indian Institute of Chemical Technology, Hyderabad
View Archive Info| Field | Value | |
| Creator |
Chattopadhyay, D.K
Sreedhar, B Raju, K.V.S.N |
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| Date |
2008-12-11T08:34:29Z
2008-12-11T08:34:29Z 2004 |
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| Identifier |
IEC Phase Mixing and Coating Properties, 0(0), A-Hp
http://hdl.handle.net/123456789/39 |
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| Description |
Structural effects of chain extender on phase mixing and coatings properties of polyether-based
moisture-cured polyurethane ureas (MCPUs) were determined with a polytetrainethylene glycol
(PTMG-1000), trimethylol propane (TMP), and isophorone diisocyanate (IPDI)-based system.
The reaction of PTMG/TMP/IPDI was carried out using a NCO/OH ratio of 1.6:l. The excess
isocyanate of the prepolymer was chain extended in the ratio of 2:l (NCO/OH) with different
aliphatic diols and 4:l with different aromatic diamines just before the coating application. The
viscoelastic properties of the cross-linked films were evaluated with a dynamic mechanical and
thermal analyzer (DMTA). The mechanical film properties such as tensile strength, adhesion
strength, and hardness were measured and related to chemical composition and cohesion of thc
hard segment. Surface properties were evaluated through angle resolved X-ray photoelectron
spectroscopy (AR-XPS). The degree of phase mixing was found to be dependent on the chain
extender structure. The results indicate that the combined analysis of the hard segment cohesion
helps in correlating the structure-to-property relationship.
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| Title |
Effect of Chain Extender on Phase Mixing and Coating Properties of Polyurethane Ureas
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| Type |
Article
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