
TY  - JOUR
A1  - Moad, G 
A1  - Solomon, DH 
A1  - Spurling, TH 
A1  - Johns, SR 
A1  - Willing, RI 
T1  - Tacticity of Poly(Methyl Methacrylate). Evidence for a Penpenultimate Group Effect in Free-Radical Polymerization
JF  - Australian Journal of Chemistry
JO  - Aust. J. Chem.
Y1  - 1986
VL  - 39
IS  - 1
SP  - 43
EP  - 50
KW  - 
UR  - https://doi.org/10.1071/CH9860043 
N2  - The tacticity of poly(methyl methacrylate ) prepared by free-radical polymerization has been determined by analysing the carbonyl region of the 13C n.m.r . spectrum. This analysis demonstrates that the addition of poly(methyl methacrylyl ) radical to methyl methacrylate in benzene at 60&#176;C is subject to a significant penpenultimate unit effect. The probability of forming a meso dyad is some 20% less if the preceding dyad in the chain is also meso . The polymerization (60&#176;C, benzene) is described by the following parameters P(m) = 0.202, P(m|m) = 0.159, P(r | m) = 0.212. 
ER  -

