Multi-scale Studies of Glass Transition and Uniaxial Tensile Properties of a Commercially Available Epoxy Adhesive Using Experimental Measurements and Molecular Dynamics Simulation

Li Yao

doi:10.1007/s10118-015-1599-x

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Multi-scale Studies of Glass Transition and Uniaxial Tensile Properties of a Commercially Available Epoxy Adhesive Using Experimental Measurements and Molecular Dynamics Simulation

PAPER | Updated：2021-06-21

- Multi-scale Studies of Glass Transition and Uniaxial Tensile Properties of a Commercially Available Epoxy Adhesive Using Experimental Measurements and Molecular Dynamics Simulation
- Chinese Journal of Polymer Science Vol. 33, Issue 3, Pages: 465-474(2015)
- Affiliations：
  
  State Key Laboratory of Automotive Safety and Energy, Department of Automotive Engineering, Tsinghua University, Beijing 100084, China
- Author bio：
  
  *Li Yao (姚力), E-mail: yaol06@mails.tsinghua.edu.cn
- Funds：
- DOI：10.1007/s10118-015-1599-x
  CLC：
- Received：14 June 2014，
  
  Revised：2014-07-23，
  
  Accepted：21 August 2014，
  
  Published：2015-03
- Accepted：
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Li Yao. Multi-scale Studies of Glass Transition and Uniaxial Tensile Properties of a Commercially Available Epoxy Adhesive Using Experimental Measurements and Molecular Dynamics Simulation[J]. Chinese Journal of Polymer Science, 2015, 33(3): 465-474.
DOI：

Li Yao. Multi-scale Studies of Glass Transition and Uniaxial Tensile Properties of a Commercially Available Epoxy Adhesive Using Experimental Measurements and Molecular Dynamics Simulation[J]. Chinese Journal of Polymer Science, 2015, 33(3): 465-474. DOI： 10.1007/s10118-015-1599-x.

摘要

Abstract

In this study

the glass transition and uniaxial tensile properties of a commercially available epoxy adhesive were investigated using experimental measurements and molecular dynamics (MD) simulation. Differential scanning calorimetry (DSC) was used to study the change of glass transition temperature (

) with cross-link density (CLD). Uniaxial tensile test was performed to measure the Young's modulus (

)

Poisson's ratio (

) and yielding strength (

). In MD simulation

the complicated epoxy system was simplified as the mixture of two kinds of simple molecules

with the key information well preserved and the less important details omitted. The molecular model of the cross-linked epoxy network was constructed and its mechanical properties were calculated using MD simulation. Overall

the MD simulation results agreed with experimental ones

which proved the validity of the molecular model and justified the simplification method of the industry-level epoxy system.

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