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Allyl polymerization. V. Effective chain transfer in the polymerization of 3‐buten‐2‐‐yl acetate. Polymerization of 3‐buten‐2‐‐ol
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AbstractThe bulk polymerization of 3‐buten‐2‐yl acetate with benzoyl peroxide as catalyst at 80°C. is characterized by degradative and effective chain transfer. Effective chain transfer constitutes 86% of the total transfer reactions. The polymerization results in a polymer with a DP of 2.8, independent of initial catalyst concentration, and in any given polymerization the disappearance of monomer is a linear function of the disapperance of peroxide, i.e., dM/dC is constant, and decreases linearly with increasing catalyst concentration, extrapolating to 38.1 at zero catalyst concentration. The values of dM/dC and conversion to polymer are higher with 3‐buten‐2‐yl acetate than with allyl acetate. The polymer from the α‐methylallyl ester contains approximately one double bond for every three monomer units at 2% peroxide concentration. The decomposition of benzoyl peroxide in 3‐buten‐2‐yl acetate is more rapid than in the allyl ester and is characterized by considerable induced decomposition. The decomposition of peroxide in methyl vinyl carbinol is extremely rapid and the conversion of monomer to polymer is very low.
Title: Allyl polymerization. V. Effective chain transfer in the polymerization of 3‐buten‐2‐‐yl acetate. Polymerization of 3‐buten‐2‐‐ol
Description:
AbstractThe bulk polymerization of 3‐buten‐2‐yl acetate with benzoyl peroxide as catalyst at 80°C.
is characterized by degradative and effective chain transfer.
Effective chain transfer constitutes 86% of the total transfer reactions.
The polymerization results in a polymer with a DP of 2.
8, independent of initial catalyst concentration, and in any given polymerization the disappearance of monomer is a linear function of the disapperance of peroxide, i.
e.
, dM/dC is constant, and decreases linearly with increasing catalyst concentration, extrapolating to 38.
1 at zero catalyst concentration.
The values of dM/dC and conversion to polymer are higher with 3‐buten‐2‐yl acetate than with allyl acetate.
The polymer from the α‐methylallyl ester contains approximately one double bond for every three monomer units at 2% peroxide concentration.
The decomposition of benzoyl peroxide in 3‐buten‐2‐yl acetate is more rapid than in the allyl ester and is characterized by considerable induced decomposition.
The decomposition of peroxide in methyl vinyl carbinol is extremely rapid and the conversion of monomer to polymer is very low.
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