Please answer b. poly (propylene) only, thank you:) I do know the formula for finding the Solubility parameter but I am curious as to how to determine the groups involved in a polymer with their E's . Your explanation to this is really appreciated, thank you

Estimate the solubility parameter of the following polymers using additivity approach? a. Poly (styrene) CH NH, S- Molar Attraction Constants, E (cal cm3/mol Group E Group E 148 226,5 -CH- 131.5 -NH 180 CH- 86 -N- 61 >C 32 ON 354.5 CH, 126,5 NCO 358.5 -CH) 121.5 209.5 84.5 CI, 342.5 -CH) aromatic 117 Cl primary 205 aromatic 98 Cl secondary -0-ether, acetal 115 Cl aromatic 161 -0-epoxide 176 F 41 C00- 326.5 Conjugation 23 >C-0 263 cis -CHO 293 trans -13.5 (CO), 567 six-membered ring -23.5 -OH- 226 ortho 9.5 OH aromatic 171 meta 6.5 -H acidic dimer -50.5 para 40 From Hoy, K.L., J. Paint Technol, 42, 76, 1970. With permission. 208 CH3 b. Poly (propylene)