| 초록 |
Polymer nanocomposites (PNCs), incorporating nanoparticles into a polymer matrix, generally enhance physical properties compared to neat polymers. As the mechanical reinforcement of PNCs relies on particle dispersion, many studies have been conducted changing basic characteristics of the polymer matrix, such as compatibility with particles, chain rigidity, and polymer molecular weight (MW). However, these studies mostly focused on the PNCs with a unimodal MW of polymer matrix. In this study, we investigate the microstructure and rheological properties of PNC made of a homopolymer blend matrix but with bimodal MW distribution and compare its property to that of a unimodal matrix. In the case of PNC with MW blends, the nanoparticles are readily aggregated regardless of the nanoparticle content, which lead to a dramatic increase of shear modulus up to ~500 times compared to that of PNC with unimodal MW. |
