Table 1. Molecular Parameters of LAL Triblock Copolymersa.
sample | middle
block |
triblock |
G (kPa) | tensile fracture strain | SAXS |
|||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
nHA | nAAPA | ntot | λ | D̵ | nBnMA | fBnMA (%) | D̵ | q* (nm–1) | d (nm) | |||
TR1 | 251 | 0 | 251 | 0 | 1.26 | 30 | 10.4 | 1.28 | 2.52 | 1.22 ± 0.02 | 0.172 | 36.5 |
TR2 | 239 | 23 | 262 | 0.09 | 1.19 | 36 | 11.5 | 1.23 | 4.07 | 1.39 ± 0.05 | 0.171 | 36.7 |
TR3 | 180 | 60 | 240 | 0.25 | 1.22 | 32 | 10.8 | 1.26 | 10.55 | 1.57 ± 0.05 | 0.194 | 32.4 |
TV1 | 180 | 60 | 240 | 0.25 | 1.22 | 40 | 13.2 | 1.28 | 12.14 | 1.60 ± 0.17 | 0.218 | 28.8 |
TV2 | 188 | 62 | 250 | 0.25 | 1.22 | 102 | 27.3 | 1.35 | 67.25 | 0.95 ± 0.15 | 0.160 | 39.2 |
TV3 | 188 | 62 | 250 | 0.25 | 1.22 | 132 | 32.7 | 1.33 | 2730.00 | 0.82 ± 0.06 | 0.168 | 37.4 |
nHA, number of HA repeating units per middle block; nAAPA, number of AAPA repeating units per middle block; ntot, total number of repeating units per middle block; nBnMA, number of BnMA repeating units for each end linear PBnMA blocks; λ, fraction of AAPA repeating units per middle block; fBnMA, volume fraction of PBnMA end blocks; D̵, polydispersity index (PDI); G, shear storage modulus G′ at 0.1 rad/s; q*, wavenumber of the primary scattering peak; d = 2π/q*, average center-to-center distance between two neighboring glassy domains; TR: triblock copolymers with different fractions of reversible bonds; TV: triblock copolymers with various volume fractions of end blocks. Error: standard deviation for n ≥ 3.