Surface characteristics of chitin-based shape memory polyurethane elastomers.
Shape memory polyurethanes (SMPUs) were prepared from polycaprolactone diol 4000 (PCL 4000), 1,4-butanediol (BDO), chitin, dimethylol propionic acid (DMPA), triethylamine (TEA) and 4,4'-diphenylmethane diisocyanate (MDI), and the structures of the synthesized materials were verified by infrared spectroscopy. The effects of chitin and DMPA contents in the polyurethane formulation on surface properties were investigated. DMPA provides function of making hydrophilic polyurethanes. The crystalline structure of chitin enhanced the hydrophobicity of the synthesized materials. Contact angle, water absorption, surface free energy, work of water adhesion and swelling behavior of the synthesized polyurethanes were affected by varying the DMPA and chitin contents. The interactions of the PU films with solvents on the surface were clearly related to the contents of DMPA and chitin in the final polyurethane formulation.
Department of Chemistry, University of Agriculture, Faisalabad 38040, Pakistan.
Khalid Mahmood
KM
Zia
Mohammad
M
Zuber
Mehdi
M
Barikani
Ijaz Ahmad
IA
Bhatti
Mohammad Bilal
MB
Khan
D002686:Chitin / Q000737:chemistry*; D020724:Elastomers / Q000737:chemistry*; D011140:Polyurethanes / Q000737:chemistry*; D013499:Surface Properties
D020724:Elastomers; D011140:Polyurethanes; D002686:Chitin