Modelling the behaviour of gas bubbles in an epoxy resin: Evaluating the input parameters for a diffusion model using a free-volume approach

1995 ◽  
Vol 30 (4) ◽  
pp. 916-922 ◽  
Author(s):  
J. R. Wood ◽  
M. G. Bader
Keyword(s):  
Epoxy Resin ◽  
Free Volume ◽  
Diffusion Model ◽  
Gas Bubbles ◽  
Input Parameters

Investigation of Nanoscopic Free Volume and Interfacial Interaction in an Epoxy Resin/Modified Clay Nanocomposite Using Positron Annihilation Spectroscopy

ChemPhysChem ◽  
2012 ◽  
Vol 13 (17) ◽  
pp. 3916-3922 ◽  
Author(s):  
Pushkar N. Patil ◽  
Kathi Sudarshan ◽  
Sandeep K. Sharma ◽  
Priya Maheshwari ◽  
Sangram K. Rath ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Positron Annihilation ◽  
Free Volume ◽  
Positron Annihilation Spectroscopy ◽  
Interfacial Interaction ◽  
Modified Clay

scholarly journals Effect of Immersion in Water or Alkali Solution on the Structures and Properties of Epoxy Resin

Polymers ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1902
Author(s):  
Bin Wang ◽  
Dihui Li ◽  
Guijun Xian ◽  
Chenggao Li
Keyword(s):  
Tensile Strength ◽  
Epoxy Resin ◽  
Free Volume ◽  
Water Uptake ◽  
Water Immersion ◽  
Alkali Solution ◽  
Molecular Chain ◽  
Hydrolysis Reaction ◽  
Resin Matrix ◽  
Structures And Properties

The durability of fiber-reinforced polymer (FRP) composites is significantly dependent on the structures and properties of the resin matrix. In the present paper, the effects of physical or chemical interactions between the molecular chain of the epoxy resin matrix and water molecules or alkaline groups on the water absorption, mechanical structures, and microstructures of epoxy resin samples were studied experimentally. The results showed that the water uptake curves of the epoxy resin immersed in water and an alkali solution over time presented a three-stage variation. At different immersion stages, the water uptake behavior of the resin showed unique characteristics owing to the coupling effects of the solution concentration gradient diffusion, molecular hydrolysis reaction, and molecular segment movement. In comparison with the water immersion, the alkali solution environment promoted the hydrolysis reaction of the epoxy resin molecular chain. After the immersion in water or the alkali solution for one month, the water uptake of the resin was close to saturate, and the viscoelasticity was observed to decrease significantly. The micropore and free volume space on the surface and in the interior of the resin gradually increased, while the original large-scale free volume space decreased. The tensile strength decreased to the lowest point after the immersion in water and the alkali solution for one month, and the decrease percentages at 20 °C and 60 °C water or 60 °C alkali solution were 24%, 28%, and 22%, respectively. Afterward, the tensile strength recovered with the further extension of immersion time. In addition, it can be found that the effect of the alkali solution and water on the tensile strength of the epoxy resin was basically the same.

scholarly journals Effect of Free Volume and Water Affinity on Corrosion Protection of Epoxy Resin Coatings

2004 ◽  
Vol 20 (04) ◽  
pp. 360-363 ◽  
Author(s):  
Zhang Shu-Yong ◽  
◽  
Kong Yan ◽  
Ding Yi-Fu ◽  
Li Shan-Jun ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Free Volume ◽  
Corrosion Protection ◽  
Water Affinity

Investigation of free volume and the interfacial, and toughening behavior for epoxy resin/rubber composites by positron annihilation

2008 ◽  
Vol 77 (3) ◽  
pp. 245-251 ◽  
Author(s):  
Zeng Minfeng ◽  
Sun Xudong ◽  
Xiao Huiquan ◽  
Ji Genzhong ◽  
Jiang Xuewen ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Positron Annihilation ◽  
Free Volume ◽  
Rubber Composites

scholarly journals Effect of Plasticization on Free-volume Hole of Epoxy Resin Evaluated by Positronium Lifetime.

RADIOISOTOPES ◽  
2002 ◽  
Vol 51 (2) ◽  
pp. 60-65
Author(s):  
Kenji ITO ◽  
Shingo HIRANO ◽  
Akira KISHIMOTO ◽  
Masaru MIYAYAMA ◽  
Yusuke UJIHIRA
Keyword(s):  
Epoxy Resin ◽  
Free Volume ◽  
Positronium Lifetime ◽  
Free Volume Hole
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