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Abstract  

The paper describes the effect of molecular mass and copolymer composition on thermal behaviour of homopolymers and copolymers of glycidyl methacrylate and methyl methacrylate. The polymerisation was done by using group transfer polymerization (GTP) and free radical techniques. A multistep decomposition was observed in polymers prepared by free radical technique indicating the presence of weak linkages in the backbone. Copolymers prepared by GTP had fewer weak sites and degraded in single step by a random chain scission.

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-to-head linkage (165 °C), scission initiated at unsaturated chain end (270 °C), and random scission of polymer main chain (360 °C). The instability of the H–H linkage is attributable to the close proximity of the bulky pendent groups creating higher localized free

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various oligomers as model compounds, reported that the least stable linkage in the oligomers was the H–H linkage ( Fig. 5 a) [ 24 ]. While the second event appears to be caused by random scission initiation (b), as shown in Fig. 5

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