1987 Volume 44 Issue 12 Pages 905-910
UV degradation of poly [1- (trimethylsilyl) -1-propyne] donated as PMSP and effects of sensitizers on the degradation were studied. PMSP was degradated by UV irradiation under air and in vacuo. The rate of degradation was enhanced in a presence of oxygen. The degradation was random chain scission as found from the relationship between the applied dose and the reciprocal of molecular weight of PMSP degraded. PMSP polymerized by NbCl5 turned out to be more degradable than that polymerized by TaCl5. This result is due to the difference of geometric structure of PMSP. The effective sensitizers chosen by a screening test were quinones such as 2-ethylanthraquinone which could abstract hydrogen from PMSP. In the spectral sensitization by the use of i line (365nm) and g line (435 nm), the composite sensitizers of quinone compound coupled with other compounds were effective. The energy transfer between composite sensitizers plays a role in the sensitization.
