Polymers Based on Methacrylate Bearing Coumarin Side Group: Synthesis via Free Radical Polymerization, Monomer Reactivity Ratios, Dielectric Behavior, and Thermal Stabilities

Table 4

TGA data for the Polymers.

Polymers	𝑇^a𝑖 (°C)	𝑇^b%50 (°C)	Weight loss (%) at 350°C	Weight loss (%) at 400°C	Residue at 500°C
Poly(MAOC)	271	371	36	73	8
Poly(MAOC 0,60-co-BMA)	227	357	43	86	6
Poly(MAOC 0,35-co-BMA)	190	360	45	85	5
Poly(MAOC 0,15-co-BMA)	180	330	65	89	10
Poly(BMA)	176	298	78	87	12
Poly(MAOC-co-MMA 0,19)	268	355	46	97	4
Poly(MAOC-co-EMA 0,19)	269	366	36	83	1
Poly(MAOC-co-IBMA 0,23)	244	322	66	98	1
Poly(MAOC) 0,35-poly(BMA) (blend polymer)	222	318	75	88	9
Poly(MAOC) 0,15-poly(BMA) (blend polymer)	219	338	65	96	1

a: initial decomposition temperature of first stage,
b: decomposition temperature at 50% weight loss,
c: by mole.