modulus (G) and tensile modulus (E) as shown in the (eq. 2).1 The bulk modulus and shear modulus can be calculated from U; it is independent of Molar Elastic Wave Function, temperature or polymeric phase state and can be calculated from additive group contribution as can be seen from (eq. 3) - (eq. 4). So the tensile modulus or Young’s modulus (E) can be estimated from (eq. 2 ) - (eq. 5). K = (UR/V)6 (eq. 3) ρ G = (UH/V)6 (eq. 4) ρ G/K = (UH/UR)6 (eq. 5) The modulus of each polyester were calculated from group contribution parameters in Table S3 considering each repeating unit structure. As shown in the Table S4, the modulus increase in the order PET, P12PT, P23BT and these trends supported that the substituted methyl group made the polymer chain stiffer. Table S3. Group contributions to the Rao and Hartmann-functions Group URa UHa 880 675 -CH2- -CH(CH3)- 1,875 1,650 1,225 900 4,100 3,300 a UR = Rao-function, UH = Hartmann function, which are experted from Table 14.4 in Ref. 1.
modulus (G) and tensile modulus (E) as shown in the (eq. 2).1 The bulk modulus and shear modulus can be calculated from Molar Elastic Wave Function, U; it is independent of temperature or polymeric phase state and can be calculated from additive group contribution as can be seen from (eq. 3) - (eq. 4). So the tensile modulus or Young’s modulus (E) can be estimated from (eq. 2 ) - (eq. 5). K = ρ (UR/V)6 (eq. 3) G = ρ (UH/V)6 (eq. 4) G/K = (UH/UR)6 (eq. 5) The modulus of each polyester were calculated from group contribution parameters in Table S3 considering each repeating unit structure. As shown in the Table S4, the modulus increase in the order PET, P12PT, P23BT and these trends supported that the substituted methyl group made the polymer chain stiffer. Table S3. Group contributions to the Rao and Hartmann-functions Group URa UHa -CH2- 880 675 -CH(CH3)- 1,875 1,650 1,225 900 4,100 3,300 a UR = Rao-function, UH = Hartmann function, which are experted from Table 14.4 in Ref. 1.
1-s2.0-S0032386117311795-mmc1.docx