Analysis of thermal and mechanical properties of annealed surface modified nanodiamond/epoxy nanocomposites

2019 ◽  
Vol 6 (12) ◽  
pp. 125316 ◽  
Author(s):  
Baljit Singh ◽  
Akash Mohanty
Keyword(s):  
Mechanical Properties ◽  
Thermal And Mechanical Properties ◽  
Epoxy Nanocomposites ◽  
Surface Modified

Effect of Cellulose Functionalization on Thermal and Mechanical Properties of Epoxy Resin

2017 ◽  
Vol 757 ◽  
pp. 62-67 ◽  
Author(s):  
Kritsanachai Leelachai ◽  
Supissara Ruksanak ◽  
Tarakol Hongkeab ◽  
Supakeat Kambutong ◽  
Raymond A. Pearson ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Diglycidyl Ether ◽  
Cellulose Content ◽  
Thermal And Mechanical Properties ◽  
Chemical Surface ◽  
Pull Out ◽  
Fiber Bridging ◽  
Surface Modified ◽  
Modified Epoxy

In this study, diglycidyl ether of bisphenol A (DGEBA) cured cycloaliphatic polyamine was modified with functionalized celluloses for improved thermal and mechanical properties. Three different types of surface-modified cellulose, polyacrylamide-g-cellulose (PGC), aminopropoxysilane-g-cellulose (SGC), and carboxymethyl cellulose (CMC), were investigated and used as reinforcing agents in epoxy resins. The storage modulus of these modified epoxy systems was found to significantly increase with addition of cellulose fillers (up to 1 wt. % cellulose content). An improved fracture toughness (KIC) was also observed with increasing cellulose loading content with PGC and SGC. Among the surface-modified celluloses, epoxy modified with SGC was found to have the highest fracture toughness followed by PGC and CMC at 1.0 wt.% cellulose addition due to the chemical surface compatibility. The toughening mechanisms of the cellulose/epoxy composites, measured by scanning electron microscopy (SEM), revealed that fiber-debonding, fiber-bridging, and fiber-pull out were responsible for increased toughness.

scholarly journals Development of new graphene/epoxy nanocomposites and study of cure kinetics, thermal and mechanical properties

2020 ◽  
Vol 694 ◽  
pp. 178785
Author(s):  
Sheikh Rehman ◽  
Sufyan Akram ◽  
Antonios Kanellopoulos ◽  
Ahmed Elmarakbi ◽  
Panagiotis G. Karagiannidis
Keyword(s):  
Mechanical Properties ◽  
Cure Kinetics ◽  
Thermal And Mechanical Properties ◽  
Epoxy Nanocomposites

scholarly journals Poly(3-hydroxybutyrate) Modified by Plasma and TEMPO-Oxidized Celluloses

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1510 ◽  
Author(s):  
Denis Mihaela Panaitescu ◽  
Sorin Vizireanu ◽  
Sergiu Alexandru Stoian ◽  
Cristian-Andi Nicolae ◽  
Augusta Raluca Gabor ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Room Temperature ◽  
Thermal And Mechanical Properties ◽  
Tempo Oxidation ◽  
Water Suspensions ◽  
Shaped Tube ◽  
Surface Modified ◽  
Mediated Oxidation ◽  
Thermal Stability Of ◽  
Modified Cellulose

Microcrystalline cellulose (MCC) was surface modified by two approaches, namely a plasma treatment in liquid using a Y-shaped tube for oxygen flow (MCC-P) and a TEMPO mediated oxidation (MCC-T). Both treatments led to the surface functionalization of cellulose as illustrated by FTIR and XPS results. However, TEMPO oxidation had a much stronger oxidizing effect, leading to a decrease of the thermal stability of MCC by 80 °C. Plasma and TEMPO modified celluloses were incorporated in a poly(3-hydroxybutyrate) (PHB) matrix and they influenced the morphology, thermal, and mechanical properties of the composites (PHB-MCC-P and PHB-MCC-T) differently. However, both treatments were efficient in improving the fiber–polymer interface and the mechanical properties, with an increase of the storage modulus of composites by 184% for PHB-MCC-P and 167% for PHB-MCC-T at room temperature. The highest increase of the mechanical properties was observed in the composite containing plasma modified cellulose although TEMPO oxidation induced a much stronger surface modification of cellulose. This was due to the adverse effect of more advanced degradation in this last case. The results showed that Y-shaped plasma jet oxidation of cellulose water suspensions is a simple and cheap treatment and a promising method of cellulose functionalization for PHB and other biopolymer reinforcements.

Thermal and mechanical properties of POSS-Cyanate ester/epoxy nanocomposites

2012 ◽  
Vol 25 (1) ◽  
pp. 87-96 ◽  
Author(s):  
S. Rakesh ◽  
C. P. Sakthi Dharan ◽  
M. Selladurai ◽  
V. Sudha ◽  
P. R. Sundararajan ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cyanate Ester ◽  
Thermal And Mechanical Properties ◽  
Epoxy Nanocomposites
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