Light Stability of Polyurethane Coatings.
UNIVERSITY OF SOUTHERN MISSISSIPPI HATTIESBURG DEPT OF POLYMER SCIENCE
Pagination or Media Count:
The photodegradation of methylene 4,4-diphenyl diisocyanate MDI and toluene diisocyanate TDI based polyurethanes is reported to be dependent on backbone chain flexibility and matrix crystallinity. Both absorbance changes and gel formation decrease as the stiffness and crystalline content of powders and films increase. Stabilizers are only marginally effective in reducing the extent of degradation of the polyurethane films.
- Radiation and Nuclear Chemistry