A polymer comprising one or more S1 units, wherein each S1 unit is represented by the following formula: and wherein i) m is either 0 or 1, and ii) A is either H or CH 3, and iii) n is an integer equal to or higher than 1, and iv) X is selected from the group consisting of X1, X2, X3, X4, X5, X6, X7, X10 and X11 as each of X1 to X11 is defined below, and wherein the black bold dot shown in each of the formulae of any one of X1 to X11 represents the attachment point of each of X1 to X11 to the S1, and wherein the attachment point is a carbon atom, wherein R 1 ', R 3 ', R 5 ', R 7 ', R 9 ', R 11 ', R 13 ', R 15 ', R 17 ' is each independently selected from the group consisting of H and CH 3, and R 2 ', R 4 ' R 6 ', R 8 ' is each independently selected from the group consisting of H, CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 10 ', R 12 ', R 14 ', R 16 ' is each independently selected from the group consisting of CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and v) Y is selected from the group consisting of Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, Y12, Y13, Y14, Y15, Y16, Y17, Y18, Y19, and Y20, as each of Y1 to Y20 is defined below and wherein the black bold dots shown in each of the formulae of any one of Y1 to Y20 represent the attachment points of each of Y1 to Y20 to the S1, wherein each attachment point is a carbon atom, wherein R 1, R 2, R 3, R 4, R 5, R 6, R 8, R 10, R 11, R 12, R 13, R 14, R 15, R 16, R 18, R 19, R 21 is each independently selected from the group consisting of H, CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 7 is either CH 2 or a C 2 -C 34 optionally-substituted-hydrocarbylene, and Rg is a C 2 -C 34 optionally-substituted-hydrocarbylene, and R 17 is a CH 3 or C 2 -C 34 optionally-substituted-hydrocarbyl, and R 20 is a C 1 -C 34 optionally-substituted-hydrocarbyl, and with the proviso that none of R 1 to R 21 comprises any carboxyl group and none of R 1 to R 21 comprises any anhydride group. i) m is either 0 or 1, and ii) A is either H or CH 3, and iii) n is an integer equal to or higher than 1, and iv) X is selected from the group consisting of X1, X2, X3, X4, X5, X6, X7, X10 and X11 as each of X1 to X11 is defined below, and wherein the black bold dot shown in each of the formulae of any one of X1 to X11 represents the attachment point of each of X1 to X11 to the S1, and wherein the attachment point is a carbon atom, wherein R 1 ', R 3 ', R 5 ', R 7 ', R 9 ', R 11 ', R 13 ', R 15 ', R 17 ' is each independently selected from the group consisting of H and CH 3, and R 2 ', R 4 ' R 6 ', R 8 ' is each independently selected from the group consisting of H, CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 10 ', R 12 ', R 14 ', R 16 ' is each independently selected from the group consisting of CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 1 ', R 3 ', R 5 ', R 7 ', R 9 ', R 11 ', R 13 ', R 15 ', R 17 ' is each independently selected from the group consisting of H and CH 3, and R 2 ', R 4 ' R 6 ', R 8 ' is each independently selected from the group consisting of H, CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 10 ', R 12 ', R 14 ', R 16 ' is each independently selected from the group consisting of CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and v) Y is selected from the group consisting of Y1, Y2, Y3, Y4, Y5, Y6, Y7, Y8, Y9, Y10, Y11, Y12, Y13, Y14, Y15, Y16, Y17, Y18, Y19, and Y20, as each of Y1 to Y20 is defined below and wherein the black bold dots shown in each of the formulae of any one of Y1 to Y20 represent the attachment points of each of Y1 to Y20 to the S1, wherein each attachment point is a carbon atom, wherein R 1, R 2, R 3, R 4, R 5, R 6, R 8, R 10, R 11, R 12, R 13, R 14, R 15, R 16, R 18, R 19, R 21 is each independently selected from the group consisting of H, CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 7 is either CH 2 or a C 2 -C 34 optionally-substituted-hydrocarbylene, and Rg is a C 2 -C 34 optionally-substituted-hydrocarbylene, and R 17 is a CH 3 or C 2 -C 34 optionally-substituted-hydrocarbyl, and R 20 is a C 1 -C 34 optionally-substituted-hydrocarbyl, and with the proviso that none of R 1 to R 21 comprises any carboxyl group and none of R 1 to R 21 comprises any anhydride group. R 1, R 2, R 3, R 4, R 5, R 6, R 8, R 10, R 11, R 12, R 13, R 14, R 15, R 16, R 18, R 19, R 21 is each independently selected from the group consisting of H, CH 3, and C 2 -C 34 optionally-substituted-hydrocarbyl, and R 7 is either CH 2 or a C 2 -C 34 optionally-substituted-hydrocarbylene, and Rg is a C 2 -C 34 optionally-substituted-hydrocarbylene, and R 17 is a CH 3 or C 2 -C 34 optionally-substituted-hydrocarbyl, and R 20 is a C 1 -C 34 optionally-substituted-hydrocarbyl, and with the proviso that none of R 1 to R 21 comprises any carboxyl group and none of R 1 to R 21 comprises any anhydride group.