Optimization of PET Glycolysis Process by Response Surface Methodological Approach: A Two-Component Modelling Using Glycolysis Time and Temperature

Table 4

Experimental values of responses and variables for glycolysis process.

Glycolysis Time (h) (𝑋1)	Glycolysis Temperature (°C) (𝑋2)	Hydroxyl values (𝑌1)	Acid values (𝑌2)	Average molecular Wt. (𝑌3)	Conversion percentage (𝑌4)
3.00	150.00	32.16	12.8	1500	20
10.00	150.00	36.12	13.7	1014	50
3.00	210.00	35.38	12.9	915	25
10.00	210.00	38.14	12.4	700	95
1.55	180.00	28.31	12.7	1224	15
11.45	180.00	38.14	13.1	695	95
6.50	137.57	34.16	12.9	845	30
6.50	222.43	38.14	15.4	700	62
6.50	180.00	38.14	12.2	695	95
6.50	180.00	38.14	12.2	695	95