[1F13-16] Polymer, oligomer(4)

[1F15] Improving mechanical properties of graft-type nanocomposites using silane modified SiO₂ and reactive polypropylene prepared by a Ziegler-Natta catalyst

○Dongzhi Zhu¹, Eiji Kurahashi², Toru Wada¹, Patchanee Chammingkwan¹, Toshiaki Taniike¹ (1. Japan Advanced Institute of Science and Technology, 2. Kojima Industries Corporation)

Polypropylene (PP), as one of the most representable commodity plastics, has been widely employed with a range of nanofillers to endow new functionalities. The main challenge in creating PP-based nanocomposites is to overcome the chemical inertness of PP, which leads to poor compatibility and weak interfacial bonding with the inorganic filler surfaces. Our group have reported the preparation of PP-OTMS, which is PP-based copolymer incorporating (7-octen-1-yl)trimethoxysilane (OTMS) as a comonomer with an amount of less than one comonomer unit per polymer chain using a Ziegler-Natta catalyst. To further improve the mechanical properties, trichlorosilanes with different alkyl chain lengths were exploited at different amounts for surface modification of SiO₂ prior to melt mixing with PP-OTMS as a matrix.

Keywords:Graft-type nanocomposites, silane modified SiO2, mechanical properties