| http://www.w3.org/ns/prov#value | - The use of polymerization catalysts is preferred and for this purpose one may use peroxides such as benzoyl peroxide, acetyl peroxide, lauroyl peroxide, di-tert-butyl peroxide, or an azo initiator such as a,a-azodiisobutyronitrile or a,a'-azobis-(a,'y-dimethylvaleronitrile).
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