Waterborne polyurethane modified with silicone macromer and the nylon airbag coated with it
Shin Hyeon Jeong (1)*, Go Cheol Wan (2), Jeong Han mo (3)
(1) University of Ulsan,aDepartment of Chemistry, Energy Harvest-Storage Research Center - Ulsan - Korea, (2) University of ulsan - Ulsan - Korea, (3) Department of Chemistry, Energy Harvest-Storage Research Center, University of Ulsan - Ulsan - Korea
A waterborne polyurethane (WPU) with a double bond in the main chain was modified with a poly(dimethylsiloxane)(PDMS) macromer having a terminal methacrylate group (PDMS methacrylate macromer) by using a radical mechanism, and the changes in various physical properties were examined. Although the crystallinity of the soft segment domain increased, the cohesion of the hard segments was weakened as a result of the modification with the PDMS methacrylate macromer. The adhesion between the WPU and nylon decreased due to the hydrophobic/low polarity of the PDMS component, and this improved the flexibility and the tear strength of the nylon-6,6 textile coated with WPU. The air permeability of the coated textile also increased as a result of the modification