Copolymerization of 4-Acetylphenyl Methacrylate with Ethyl Methacrylate: Synthesis, Characterization, Monomer Reactivity Ratios, and Thermal Properties

Table 1

Monomer and copolymer composition data, molecular weights, and P.I indices of copolymers.

Exp. no.	Initial mon. compositions		% conversion	Final mon. compositions		𝐶	Copolymer composition from ^1H NMR		Copolymer compositions from FTIR		Molecular weights
	[𝐴]	[𝐵]		[𝐴]_fin	[𝐵]_fin		APMA; 𝑃𝐴	EMA; 𝑃𝐵	APMA; 𝑃𝐴	EMA; 𝑃𝐵	𝑀𝑛	P.I
1	0.10	0.90	33	0.07	0.60	0.179	0.15	0.85	0.18	0.82	89000	1.37
2	0.20	0.80	33	0.13	0.54	0.340	0.25	0.75	0.27	0.73	—	—
3	0.35	0.65	31	0.24	0.45	0.615	0.38	0.62	0.38	0.62	107800	1.4
4	0.50	0.50	36	0.32	0.32	1.298	0.56	0.44	0.50	0.50	—	—
5	0.70	0.30	37	0.44	0.19	2.500	0.71	0.29	0.66	0.34	112000	1.28
6	0.90	0.10	38	0.56	0.06	7.690	0.88	0.12	0.81	0.19	119000	1.25