How to regulate the isothermal growth rate of polymer spherulite without changing its molecular composition?

Poly(butylene succinate-co-butylene fumarate) (PBSF) can work as a highly efficient polymeric nucleating agent for poly(butylene succinate) (PBS) and this is based on epitaxial crystallization, namely matching of the crystal lattice. Benefiting from the unique behavior in which PBSF can enhance the spherulite growth rate (G) of PBS, a new method combining the addition of a fixed amount of PBSF and self-nucleation has been proposed to regulate G of isothermally crystallized PBS for the first time.