Fabrication of polyketone-grafted multi-walled carbon nanotubes using Grignard reagent and their composites with polyketone

• Published in: Composites science and technology Vol. 167; pp. 199 - 205
• Main Authors: Nam, Jeong Ung, Choi, Eun Yeob, Park, Hye Jin, Kim, C.K.
• Format: Journal Article
• Language: English
• Published: Barking Elsevier Ltd 20-10-2018; Elsevier BV
• Subjects: Adhesion; Adhesive strength; Aliphatic compounds; Aliphatic polyketone; Carbon nanotubes (A); Composite; Composite materials; Extrusion; Multi wall carbon nanotubes; Nanotubes; Polyketone-grafted carbon nanotubes; Pyrenyl Grignard reagent; Reagents; Thermal analysis; Polyketone-grafted carbon nanotubes; PMgBr; PBr; PK-g-MWCNT; Aliphatic polyketone; Carbon nanotubes (A); Pyrenyl Grignard reagent; Composite; MWCNT-PMgBr; MWCNT; PK
• ISSN: 0266-3538; 1879-1050
• DOI: 10.1016/j.compscitech.2018.07.043

A Grignard reagent containing pyrene, 1-pyrenylmethylmagnesium bromide (PMgBr), was explored as a novel reactive compatibilizer for producing aliphatic polyketone (PK) composites with multi-walled carbon nanotube (MWCNT) that had improved interfacial adhesion and mechanical strength. 1-Bromomethylpyrene (PBr) was adsorbed on MWCNTs and reacted with Mg to produce PMgBr on MWCNTs (MWCNT-PMgBr). PK-grafted MWCNT (PK-g-MWCNT) was prepared by reacting MWCNT-PMgBr with PK, and its composite with PK was fabricated by melt extrusion. The formation of PK-g-MWCNT was examined by spectroscopy, electron microscopy, and thermal analysis. The PK interfacial adhesion energies with MWCNTs were quantified, and the mechanical strengths of their composites examined. PK-g-MWCNT had the highest interfacial adhesion energy with PK among the MWCNTs. The PK/PK-g-MWCNT composite showed better MWCNT dispersion in PK and interfacial adhesion between MWCNT and PK than the PK/pristine MWCNT composite. Consequently, the PK/PK-g-MWCNT composite exhibited higher mechanical strength than the PK/pristine MWCNT composite when the composite contained the same amount of MWCNTs.