I am using Vazo 68 (4,4-azobis cyanovaleric acid) in the homopolymerization of methacrylic acid. Vaz0 68 has to be stored at around 5 oC. The reaction generally proceeds with adding the Vazo and monomer to deionized water (which has been boiled beforehand to remove additional dissolved oxygen) at room temperature, then heating the reaction to 74 oC. Due to efficiency and time issues how would the reaction be affected if instead of boiling the water and waited for it to cool, I heated it to 45-50 oC and let the steam escape for around 30 minutes. Then instead of letting it cool, I added the monomer and initiator at 45 oC and heated to the target temperature of 74 oC.
My main goal is to achieve a specific viscosity on the final polymer, if that helps. If anyone can help on the chemistry that could take place in regards to the initiator that would be appreciated. I am thinking that the Vazo molecules may dissociate and recombine quicker at 40 oC, thus reducing the rate of polymerisation. The half-life of Vazo at 60 oC is 10 hours if that helps. Thanks.