For the purpose of development of graphene/polylactide composites with good performance, a compatibilizer
functionalized with pyrene was synthesized by one-step ring-opening polymerization, which presented
strong p–p interaction with graphene. The dispersing stability of graphene in organic solvents
facilitated the fabrication of composites with uniformly distributed graphene by a solution-cast method.
For the resultant composites of graphene and polylactide, the compatibilizer showed positive effects of
enhancing crystallization, thermal stability and mechanical property of the composites. Moreover, electrical
conductivity of the polymer matrix was greatly increased with the incorporation of graphene, and
the addition of the compatibilizer did not cause an obvious change in the electrical conductivity of the
resultant composites. The results implied that the compatibilizer, which was obtained by the simple
and facile synthetic strategy presented herein, had great potential in the field of composites based on
polymer and carbon allotropes.