Table 2 Thermal analysis and kinetics parameters of TG curves of (CMCH/ALG)-g-PAA and ZnO-g-C3N4@(CMCH/ALG)-g-PAA copolymers.

From: Boosting adsorption capacity of methylene blue dye by multiple functional ZnO-g-C3N4/ carboxymethyl chitosan/alginate –grafted polyacrylic acid composite

(CMCH/ALG)-g-PAA

Step

Temp. range oC

Max. weight loss oC

R2

RSS

n

Ea (J mol− 1)

1st

41.09-171.81

98.76

0.9983

1.16 × 10− 12

0.5

-0.0107

2nd

180.55-300.63

245.47

0.9918

6.11 × 10− 13

0.5

-0.0112

3rd

329.33-524.11

392.09

0.9783

2.37 × 10− 11

0

-0.0374

 

Ʃ -0.05939

ZnO-g-C3N4@(CMCH/ALG)-g-PAA

Step

Temp. range oC

Max. weight loss oC

R2

RSS

n

Ea (J mol− 1)

1st

34.95-194.04

-

0.9995

2.01 × 10− 12

0

-0.0226

2nd

194.04-239.26

222.01

0.9936

2.21 × 10− 14

0.5

-0.0097

3rd

239.26-311.21

281.12

0.9935

6.87 × 10− 14

0.5

-0.0104

4th

320.33-528.31

364.43

0.9916

4.25 × 10− 13

0.5

-0.0731

 

Ʃ -0.1158

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