Abstract
Chemical actinometry was used to make the first reliable determination of the quantum yield of the solid state polymerization of two diacetylenes RCCCCR, the first compound being 5,7-dodecadiyn-1,12-bis( n-butoxycarbonylmethylene urethane) (4BCMU) where R (CH 2) 4-OCONHCH 2COO(CH 2) 3CH 3 and the second being 2,4-hexadiyn-1,6-bis( p-toluenesulfonate) (1 pTS) where ▪. The number of monomer molecules polymerized on irradiation at 254 nm was determined by absorption spectroscopy. A quantum yield of above 50 was observed for 4BCMU while 1 pTS gave the much lower value of 0.06 ± 0.03. The lower quantum yield for 1 pTS is explained by the low molecular weight chains provided by polymerization.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
