Polymer/layered silicate nanocomposites: a review from preparation to processing

Department of Materials Science, University of Patras, 26504 Rio Patras, Greece, Theoretical and Physical Chemistry Institute, National Hellenic Research Foundation, 48 Vass. Constantinou Avenue, 116 35 Athens, Greece, Institut de Biologie Moleculaire et Cellulaire, UPR9021 CNRS, Immunologie et Chimie Therapeutiques, 67084 Strasbourg, France, and Dipartimento di Scienze Farmaceutiche, Universita di Trieste, Piazzale Europa 1, 34127 Trieste, Italy

Chemistry of Carbon Nanotubes

Small but strong: A review of the mechanical properties of carbon nanotube–polymer composites

https://cyberleninka.org/article/n/933162.pdf

Hydrogels in drug delivery: progress and challenges

Carbon nanotubes (CNTs) hold the promise of delivering exceptional mechanical properties and multi-functional characteristics. Ever-increasing interest in applying CNTs in many different fields has led to continued efforts to develop dispersion and functionalization techniques. To employ CNTs as effective reinforcement in polymer nanocomposites, proper dispersion and appropriate interfacial adhesion between the CNTs and polymer matrix have to be guaranteed. This paper reviews the current understanding of CNTs and CNT/polymer nanocomposites with two particular topics: (i) the principles and techniques for CNT dispersion and functionalization and (ii) the effects of CNT dispersion and functionalization on the properties of CNT/polymer nanocomposites. The fabrication techniques and potential applications of CNT/polymer nanocomposites are also highlighted.

Dispersion and functionalization of carbon nanotubes for polymer-based nanocomposites: a review

A series of amorphous fluoro-polyetherimides based on 2,2'-bis(3,4-dicarboxyphenyl) hexafluropropane dianhydride (6FDA) and di-ether-containing diamines 4,4'-bis(3-aminophenoxy)diphenyl sulfone (m-SED), 4,4'-bis(4-aminophenoxy)diphenyl sulfone (pSED), 4,4-bis(4-aminophenoxy)diphenyl propane (BPADE) were synthesized. These melt processable polyetherimide polymers from pSED and BPADE showed excellent electrical properties. The dielectric constants, 2.74 and 2.65 at 10 MHz respectively, are lower than commercially available polyetherimide ULTEM@ 1000, and polyimide Kapton@ H films. In addition, we found that trifluoromethyl groups-containing polyimides not only show extraordinaxy electrical properties, but they also exhibit excellent long-term thermo-oxidative stability and reduced water absorption relative to non-fluorinated polyimides. The weight retention of these fluoro-polyetherimides at 3 15°C for 300 h in air varies from 93% to 98%. Whereas, their moisture absorption at 100 RH at 50°C was in the range of 0.3% to 1.05%, which is much lower than those of Ultem 1000 and Kapton H. In the case of fluoro-polyetherimides from pSED and m-SED @ara and meta isomers) diamines with 'ether' and sulfonyl (-SO,-) spacer groups, the d-spacing and Tg values decreased from 4.7d to 4.56A and 293°C to 244°C respectively. Similarly, the transparency of these polymer films (in the range of 80% to 90%) at 500 nm solar wavelength was higher than Ultem 1000 and Kapton H. 1. I"R0DUCTION romatic polyimides possess outstanding thermal A mechanical and electrical properties as well as excellent chemical resistance (1). The search for new polyimides with improved processability and higher glass transition temperatures (TJ than the commercially available polyetherimide Ultem 1000 has received significant attention from both academia and industries. It is also known that structural rigidity of dianhydrides contributes to the increase in the glass transition temperatures of those polyimides in the range of 300 to 400°C. Therefore, because of their poor solubility in common organic solvents and high softening temperatures, uses of these polymers in industrial applications are limited. Because of these

Suat Hong Goh

Papers

Synthesis and Properties of Fluoro-Polyetherimides

Interpolymer Complexes through Hydrophobic Interactions: C60-End-Capped Poly(ethylene oxide)/Poly(methacrylic acid) Complexes

The accelerated CO2 plasticization of ultra-thin polyimide films and the effect of surface chemical cross-linking on plasticization and physical aging

XPS and FTi.r. studies of interactions in poly(carboxylic acid)/poly(vinylpyridine) complexes

Miscibility, melting and crystallization behavior of two bacterial polyester/poly(epichlorohydrin-co-ethylene oxide) blend systems