The glass transition (Tg)

β relaxation and dynamic mechanical properties of PC/PS/ nanoCaCO3 and PC/PS/encapsulated nanoCaCO3 composites before and after physical aging were characterized by DSC and DMA analysis

in order to study the effect of nanofillers on the segment relaxation movement of PS. The results showed that the nanoCaCO3 accelerated the segment relaxation of PS due to the weak interaction between the matrix and the nanoparticles

the Tg

loss modulus peak temperature and β relaxation temperature of PS phase decrease. On the contrary

encapsulated nanoCaCO3 preferred to improve the interface interaction and thus increased the Tg temperature

the loss modulus peak temperature

β relaxation temperature and storage modulus of PC/PS/encapsulated nanoCaCO3 composites compared with PC/PS/nanoCaCO3 composites. The Tg and enthalpy loss of PC/PS

PC/PS/nano CaCO3 and PC/PS/encapsulated nanoCaCO3 composites all increased with the time of physical aging

but the increment was fewer for PC/PS/encapsulated nanoCaCO3 composites. Physical aging induced different enhancement in the storage modulus of PC/PS/nanoCaCO3 composite.