Investigation of thermal properties and structural characterization of novel boron-containing Schiff base polymers

Table 5 Interpretation of the TGA curves recorded at 5, 15 and 45 °C/min.(Schiff base monomers and polymers)

Compound	Step	β₅			β₁₅			β₄₅
Compound	Step	T_a	T_b	%_c	T_a	T_b	%_c	T_a	T_b	%_c
BS-OH	1st	128–243	212	24.56	14–278	227	24.70	154–318	247	24.98
BS-OH	2nd	245–1000	664	63.70	279–1000	522	37.44	319–1000	603	36.28
BS-Cl	1st	97–190	167	17.59	123–236	186	22.56	137–277	202	23.75
	2nd	195–405	322	39.46	237–477	386	40.35	276–514	409	44.89
	3rd	409–1000	708	36.26	478–1000	799	36.11	515–1000	809	22.18
BS-CH₃	1st	129–170	148	18.66	149–219	168	19.98	128–265	184	24.86
	2nd	178–427	342	41.52	230–470	409	33.94	267–460	428	27.89
	3rd	430–1000	798	23.98	472–1000	481	22.46	462–1000	488	26.17
PBS-OH	1st	80–388	266	26.54	83–553	143	35.11	96–531	282	32.60
PBS-OH	2nd	390–1000	638	70.87	554–1000	682	35.16	532–1000	702	24.57
PBS-Cl	1st	81–625	381	38.90	73–624	304	27.94	86–666	627	26.73
PBS-Cl	2nd	626–1000	774	12.66	626–1000	783	22.66	668–1000	793	21.35
PBS-CH₃	1st	86–552	275	37.30	79–598	297	34.48	97–626	326	33.84
PBS-CH₃	2nd	554–1000	762	36.62	600–1000	712	19.32	628–1000	686	12.39

T_a: Mass loss temperature ranges, T_b: Maximum temperature on the DTA curve, %_c: Percentage of lost mass of the sample in the temperature range

ISSN: 2661-801X