Photopolymerization lauryl acrylate

Polymerization Rate Dependence on Residual Polymerization Heat Lauryl Acrylate Photopolymerization... 

Lauryl Acrylate Polymerization by Photo-activated Trigonal 14 Initiation. A more extensive preliminary study of the capability of calorimetry to follow rapid photopolymerization reactions was made of the kinetics of LA polymerization initiated by photo-activated TR-14. 

Figure 2. Photopolymerization exotherm trace. Rate of sample heat change vs. time at 40° C. Photoactivated Trigonal 14 initiation of lauryl acrylate polymerization.

Figure 4. Dependence of —dH/dt exotherm rate at peak on initial Trigonal 14 concentration in photopolymerizations of lauryl acrylate. , 800 - - W, inhibited monomer, T = 52°C, DSC-IB O, 800 - -W,T — 30° (Series TV) 40aW. T = 40°C (Series V) C, 400W, 0.1 neutral density filter, T — 40°C ("Scries VI).

Peroxide initiated polymerizations (scan 30°-250°C) of lauryl acrylate (LA), I,6-hexanediol diacrylate (HDDA), neopentyl glycol diacrylate (NPGDA), and trimethylol propane triacrylate (TMPTA) revealed total polymerization heats per mole of C=C of 19.2, 17.6, 16,7, and 15.4 kcal, respectively. PhotoactIvated Trigonal 14 initiated polymerizations at 40° yielded total polymerization heats per mole of C=C of 17.4, 11.7, 8.2, and 9.1 kcal for LA, HDDA, NPGDA, and TMPTA, respectively. At 60°C the photopolymerization heats for the latter three monomers increased to 16.6, 9.7, and 10.2 kcal per mole of C=C, respectively. 

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