• 文献标题:   In-situ cure monitoring of epoxy/graphene nanocomposites by several spectroscopic techniques
  • 文献类型:   Article
  • 作  者:   YUSTESANCHEZ V, MARIANELLA HS, EZQUERRA TA, VERDEJO R, LOPEZMANCHADO MA
  • 作者关键词:   epoxy resin, graphene, nanocomposite, insitu curing, broadband dielectric spectroscopy
  • 出版物名称:   POLYMER TESTING
  • ISSN:   0142-9418 EI 1873-2348
  • 通讯作者地址:   CSIC
  • 被引频次:   0
  • DOI:   10.1016/j.polymertesting.2019.106114
  • 出版年:   2019

▎ 摘  要

Cure protocols of thermoset resins usually comprise two isothermal steps where resins undergo molecular crosslinking processes. The cure conditions are crucial to ensure a consistent and reliable manufacturing of the piece and have been the subject of an important body of research. While most studies have been carried out by traditional calorimetry or infrared spectroscopy under dynamic conditions, the development of new sensors and in-situ characterization techniques has resulted on a renewed interest on the subject under industrial isothermal protocols. Here, we monitor the curing reaction of both un-filled and nanofilled epoxy resin using broadband dielectric spectroscopy (BDS) and correlate the results with in-situ FT-IR and Raman spectroscopy. Hence, the proposed methodology provides complementary information on the chemical reactions and molecular dynamics associated to the cure cycle and can be an efficient tool for real-time monitorization of thermoset composites manufacturing.