Skip to content Skip to navigation

Core-Shell Gyroid in ABC Bottlebrush Block Terpolymers

A  principal  obstacle  to  widespread  applications  of  self-assembled network morphologies (NETs) of linear block polymers is access to only limited pore diameters and unit cell dimensions (typically <50 nm),  originating  from  their  coil  configurations  and  slow  self-assembly  kinetics  at  high  molar  masses. A  bottlebrush  molecular architecture  with  extended  backbone  configurations  due  to  side chain  crowding  could  circumvent  these  shortcomings.  However, NETS are very rarely observed in block bottlebrush polymers.

IRG-2  researchers  systematically  explored  the  phase  behavior  of 25 AB diblock and 108 ABC triblock bottlebrush polymers. A core-shell double gyroid NET was achieved in a substantial subset of the ABC   triblock   bottlebrush   terpolymers   for   the   first   time. Encouragingly,  the  unit  cell  dimensions  (d)  of  these  assemblies increase  almost  linearly  with  molecular  weight,  portending  the ability  to  access  larger NET  dimensions  than  previously  obtained with  linear  block  polymers  for  potential  optical  materials applications.