Albanese Kaitlin R, Blankenship Jacob R, Quah Timothy, Zhang Amy, Delaney Kris T, Fredrickson Glenn H, Bates Christopher M, Hawker Craig J
Department of Chemistry & Biochemistry, University of California, Santa Barbara, California 93106, United States.
Materials Research Laboratory, University of California, Santa Barbara, California 93106, United States.
ACS Polym Au. 2023 Jul 18;3(5):376-382. doi: 10.1021/acspolymersau.3c00012. eCollection 2023 Oct 11.
The promise of ABC triblock terpolymers for improving the mechanical properties of thermoplastic elastomers is demonstrated by comparison with symmetric ABA/CBC analogs having similar molecular weights and volume fraction of B and A/C domains. The ABC architecture enhances elasticity (up to 98% recovery over 10 cycles) in part through essentially full chain bridging between discrete hard domains leading to the minimization of mechanically unproductive loops. In addition, the unique phase space of ABC triblocks also enables the fraction of hard-block domains to be higher ( ≈ 0.4) while maintaining elasticity, which is traditionally only possible with non-linear architectures or highly asymmetric ABA triblock copolymers. These advantages of ABC triblock terpolymers provide a tunable platform to create materials with practical applications while improving our fundamental understanding of chain conformation and structure-property relationships in block copolymers.
通过与具有相似分子量以及B和A/C域体积分数的对称ABA/CBC类似物进行比较，证明了ABC三嵌段三元共聚物在改善热塑性弹性体机械性能方面的前景。ABC结构部分地通过离散硬域之间基本完全的链桥接提高了弹性（在10个循环中恢复率高达98%），从而使无机械作用的链环最小化。此外，ABC三嵌段共聚物独特的相空间还能使硬嵌段域的比例更高（约为0.4），同时保持弹性，而这在传统上只有通过非线性结构或高度不对称的ABA三嵌段共聚物才能实现。ABC三嵌段三元共聚物的这些优点提供了一个可调节的平台，用于制造具有实际应用价值的材料，同时增进我们对嵌段共聚物中链构象以及结构-性能关系的基本理解。
