Journal
PROGRESS IN ORGANIC COATINGS
Volume 71, Issue 1, Pages 36-42Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2010.12.007
Keywords
Polyurethane (PU); Cloisite 20B; Nanohybrid; Solution blending; Thermal property; Mechanical property; Water absorption property
Funding
- Korean Government (MEST) [NRF-2009-C1AAA001-0092926]
- Ministry of Knowledge Economy, Republic of Korea [2009T100100606]
Ask authors/readers for more resources
Nanohybrids based on UV-curable polyurethane acrylate (PU) and cloisite 20B (C-20B) have been synthesized by solution blending method using different loading levels of C-20B. The structures of PU/C-20B nanohybrids were confirmed by Fourier transform infrared spectroscopy (FIR) while X-ray diffraction and transmission electron microscopy (TEM) showed the intercalation of PU into layer silicates. The thermal properties of PU and PU/C-20B nanohybrids were investigated by thermal gravimetric analysis (TGA) and differential scanning calorimetric (DSC). TGA tests revealed that the thermal decomposition temperature (T-d10%) of the nanohybrid containing 5 wt% of C-20B increased significantly, being 61 degrees C higher than that of pure PU while DSC measurements indicated that the introduction of 5 wt% of clay increased the glass transition temperature from 89.7 to 101 degrees C. Accordingly, the mechanical and anti-water absorption properties proved also to be enhanced greatly as evidenced by nanoindentation anylsis and water absorptions data in which the nanohybrid containing 5 wt% of clay have highest elastic modulus (4.508 GPa), hardness (0.230 GPa) and lowest water absorption capacity. Thus the formations of nanohybrids manifests through the enhancement of thermal, mechanical and anti-water absorption properties as compared with neat PU due to the nanometer-sized dispersion of layered silicate in polymer matrix. (C) 2011 Published by Elsevier B.V.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available