Miscibility, Intramolecular Specific Interactions and Mechanical Properties of a DGEBA Based Epoxy Resin Toughened with a Sliding Graft Copolymer

Xue Li; Hai-lan Kang; Jian-xiang Shen; Li-qun Zhang; Toshio Nishi; Kohzo Ito

doi:10.1007/s10118-015-1596-0

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Miscibility, Intramolecular Specific Interactions and Mechanical Properties of a DGEBA Based Epoxy Resin Toughened with a Sliding Graft Copolymer

PAPER | Updated：2021-06-21

- Miscibility, Intramolecular Specific Interactions and Mechanical Properties of a DGEBA Based Epoxy Resin Toughened with a Sliding Graft Copolymer
- Chinese Journal of Polymer Science Vol. 33, Issue 3, Pages: 433-443(2015)
- Affiliations：
  
  a.State Key Laboratory for Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing 100029, China
  b.Key Laboratory of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, China
  c.Department of Applied Physics, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113, Japan
  d.Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
- Author bio：
  
  **Li-qun Zhang (张立群), E-mail: zhanglq@mail.buct.edu.cn
- Funds：
- DOI：10.1007/s10118-015-1596-0
  CLC：
- Received：30 May 2014，
  
  Revised：2014-06-18，
  
  Accepted：15 July 2014，
  
  Published：2015-03
- Accepted：
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Xue Li, Hai-lan Kang, Jian-xiang Shen, et al. Miscibility, Intramolecular Specific Interactions and Mechanical Properties of a DGEBA Based Epoxy Resin Toughened with a Sliding Graft Copolymer[J]. Chinese Journal of Polymer Science, 2015, 33(3): 433-443.
DOI：

Xue Li, Hai-lan Kang, Jian-xiang Shen, et al. Miscibility, Intramolecular Specific Interactions and Mechanical Properties of a DGEBA Based Epoxy Resin Toughened with a Sliding Graft Copolymer[J]. Chinese Journal of Polymer Science, 2015, 33(3): 433-443. DOI： 10.1007/s10118-015-1596-0.

摘要

Abstract

The "sliding graft copolymer" (SGC)

in which many linear poly-

-caprolactone (PCL) side chains are bound to cyclodextrin rings of a polyrotaxane (PR)

was prepared and employed to toughen diglycidyl ether of bisphenol A (DGEBA) based epoxy resin. The aim of the work is to understand the effect of SGC on the miscibility

morphology

thermal behavior

curing reaction and mechanical performance of the cured systems. From differential scanning calorimetry (DSC) analysis and dynamic mechanical thermal analysis (DMTA) of DGEBA/SGC thermosetting blends

it is found that DGEBA and SGC are miscible in the amorphous state. Fourier transform infrared spectroscopy (FTIR) suggested that the miscibility between SGC and DGEBA is due to the existence of intermolecular specific interactions (

viz

. hydrogen bonding). The impact strength is improved by 4 times for DGEBA/SGC (80/20) blends compared with that of the unmodified system. The increase in toughness of SGC-modified thermosets can be explained by the effect of intermolecular specific interactions of SGC with DGEBA

which is beneficial to induce the plastic deformation of matrix. This is the first report on utilizing this novel supramolecular polymer to toughen rigid epoxy matrix.

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