The amount of substance of POSS-DMDBS in POSS-DMDBS3 is approximately equal to DMDBS and POSS-SH in the corresponding samples.
DMDBS has higher nucleating efficiency for iPP, and the crystalline texture is evenly and individual spherulites cannot be distinguished in the polarized light micrographs.
Aforementioned phenomenon elucidated that chemical bonding between DMDBS and POSS-SH has a greater inhibitive effect on the formation of nanofibril than hydrogen bonding, eventually leading to the decrease of nucleating efficiency.
Figure 5 showed the formation of the spherulites in the samples containing DMDBS and POSS-DMDBS in the 3 X 3 [micro]m AFM micrograph.
A conjectured explanation was that DMDBS can finely crystallize and self-assemble into nanofibrils to provide active nucleation sites.
3 wt% of DMDBS presented obvious increase in crystallization temperature.
and this illustrated the chemical bonding between DMDBS and POSS further restrained the formation of the nanofibrils and receded the nucleation effect of DMDBS-POSS.
It can be seen that the DMDBS involved iPP samples have the lower [t.