Current time in Korea 07:21 Oct 24 (Tue) Year 2017 KCS KCS Publications
KCS Publications
My Journal Log In Register
HOME > Search > Browsing(BKCS) > Archives

Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 32, Number 8
BKCSDE 32(8)
August 20, 2011 

 
Title
Synthesis and Characterization of Novel Hydrogenated Poly(norbornene bisimide)s Prepared from Ring Opening Metathesis Polymerization
Author
Kyung-Hwan Yoon, Seung Beom Park, Insook Park, Do Y. Yoon*
Keywords
Polynorbornene, Poly(norbornene imide), Poly(norbornene bisimide), ROMP, Flexible substrates
Abstract
We synthesized three novel poly(norbornene bisimide)s by ring opening metathesis polymerization (ROMP) and subsequent hydrogenation. Their thermal, mechanical and optical properties were investigated with TGA, DMA, UV-Vis spectrometer, and optical reflectometer. The new polymers showed high glass transition temperatures over 260 oC and good thermal stability with 5% wt-loss temperature higher than 390 °C. When solvent casted, they yielded optically transparent and dimensionally stable films with a relatively low coefficient of thermal expansion of about 50 ppm K−1. Therefore, the bisimide moieties substantially enhanced thermal and dimensional stabilities, as compared with normal ROMP-prepared polynorbornene films. Though the water uptake was increased to 0.6 wt-%, this water uptake is still considerably lower than that for polyethersulfones (1.4 wt-%) or polyimides (2.0 wt-%). Hence, the new poly(norbornene bisimide)s may become attractive candidates for flexible substrates of optoelectronic devices such as displays and photovoltaic solar cells.
Page
3074 - 3080
Full Text
PDF