Insights into the synergistic mechanism of reactive aliphatic soft chains and nano‐silica on toughening epoxy resins with improved mechanical properties and low viscosity

2021 ◽  
Vol 138 (21) ◽  
pp. 50484
Author(s):  
Hongfeng Chen ◽  
Qingsong Lian ◽  
Weijie Xu ◽  
Xuqi Hou ◽  
Yan Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resins ◽  
Nano Silica ◽  
Low Viscosity ◽  
Synergistic Mechanism

OS0521 Non-Stoichiometric Curing Effect on Mechanical Properties of Nano-Silica Particulate-Filled Epoxy Resins

2014 ◽  
Vol 2014 (0) ◽  
pp. _OS0521-1_-_OS0521-3_
Author(s):  
Tadaharu ADACHI ◽  
Markus Karamoy UMBOH ◽  
Masahiro HIGUCHI ◽  
Tadamasa NEMOTO ◽  
Zoltan MAJOR
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resins ◽  
Nano Silica

Mechanical Properties of Epoxy Resins Filled with Nano-Silica Particles

2016 ◽  
pp. 225-234
Author(s):  
Tadaharu Adachi ◽  
Markus Karamoy Umboh ◽  
Tadamasa Nemoto ◽  
Masahiro Higuchi ◽  
Zoltan Major
Keyword(s):  
Mechanical Properties ◽  
Epoxy Resins ◽  
Silica Particles ◽  
Nano Silica

scholarly journals Mechanical Properties and Epoxy Resin Infiltration Behavior of Carbon-Nanotube-Fiber-Based Single-Fiber Composites

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 106
Author(s):  
Jongseon Shin ◽  
Kyunbae Lee ◽  
Yeonsu Jung ◽  
Byeongjin Park ◽  
Seung Jae Yang ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Epoxy Resins ◽  
Fiber Composites ◽  
Single Fiber ◽  
Composite Fibers ◽  
Low Viscosity ◽  
Carbon Nanotube Fiber ◽  
Lower Load ◽  
Infiltration Behavior

Carbon nanotube fiber (CNTF), prepared by the direct-spinning method, has several nanopores, and the infiltration behavior of resins into these nanopores could influence the mechanical properties of CNTF-based composites. In this work, we investigated the infiltration behavior of resin into the nanopores of the CNTFs and mechanical properties of the CNTF-based single-fiber composites using six epoxy resins with varying viscosities. Epoxy resins can be easily infiltrated into the nanopores of the CNTF; however, pores appear when a resin with significantly high or low viscosity is used in the preparation process of the composites. All the composite fibers exhibit lower load-at-break value compared to as-densified CNTF, which is an unexpected phenomenon. It is speculated that the bundle structure of the CNTF can undergo changes due to the high affinity between the epoxy and CNTF. As composite fibers containing pores exhibit an even lower load-at-break value, the removal of pores by the defoaming process is essential to enhance the mechanical properties of the composite fibers.

The Mechanical Properties of Organic Modified Epoxy Resin

2020 ◽  
Vol 43 (3) ◽  
pp. 10-14
Author(s):  
Georgel MIHU ◽  
Claudia Veronica UNGUREANU ◽  
Vasile BRIA ◽  
Marina BUNEA ◽  
Rodica CHIHAI PEȚU ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Epoxy Resin ◽  
Epoxy Matrix ◽  
Epoxy Resins ◽  
Mechanical Tests ◽  
Organic Modification ◽  
Three Point Bending ◽  
Modified Epoxy

Epoxy resins have been presenting a lot of scientific and technical interests and organic modified epoxy resins have recently receiving a great deal of attention. For obtaining the composite materials with good mechanical proprieties, a large variety of organic modification agents were used. For this study gluten and gelatin had been used as modifying agents thinking that their dispersion inside the polymer could increase the polymer biocompatibility. Equal amounts of the proteins were milled together and the obtained compound was used to form 1 to 5% weight ratios organic agents modified epoxy materials. To highlight the effect of these proteins in epoxy matrix mechanical tests as three-point bending and compression were performed.

scholarly journals An Effective Method for Preparation of Liquid Phosphoric Anhydride and Its Application in Flame Retardant Epoxy Resin

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2205
Author(s):  
Qian Li ◽  
Yujie Li ◽  
Yifan Chen ◽  
Qiang Wu ◽  
Siqun Wang
Keyword(s):  
Flame Retardant ◽  
Epoxy Resin ◽  
Epoxy Resins ◽  
Oxygen Index ◽  
Decomposition Temperature ◽  
Ease Of Use ◽  
Limiting Oxygen Index ◽  
Good Thermal Stability ◽  
Low Viscosity ◽  
The Impact

A novel liquid phosphorous-containing flame retardant anhydride (LPFA) with low viscosity was synthesized from 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide (DOPO) and methyl tetrahydrophthalic anhydride (MeTHPA) and further cured with bisphenol-A epoxy resin E-51 for the preparation of the flame retardant epoxy resins. Both Fourier transform infrared spectroscopy (FT-IR), mass spectrometry (MS) and nuclear magnetic resonance (NMR) measurements revealed the successful incorporation of DOPO on the molecular chains of MeTHPA through chemical reaction. The oxygen index analysis showed that the LPFA-cured epoxy resin exhibited excellent flame retardant performance, and the corresponding limiting oxygen index (LOI) value could reach 31.2%. The UL-94V-0 rating was achieved for the flame retardant epoxy resin with the phosphorus content of 2.7%. With the addition of LPFA, the impact strength of the cured epoxy resins remained almost unchanged, but the flexural strength gradually increased. Meanwhile, all the epoxy resins showed good thermal stability. The glass transition temperature (Tg) and thermal decomposition temperature (Td) of epoxy resin cured by LPFA decreased slightly compared with that of MeTHPA-cured epoxy resin. Based on such excellent flame retardancy, low viscosity at room temperature and ease of use, LPFA showed potential as an appropriate curing agent in the field of electrical insulation materials.

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