Journal of Polymer Research

, 25:39 | Cite as

Aging induced ductile-brittle-ductile transition in bisphenol A polycarbonate

  • Long Jiang
  • Mingyong Zhou
  • Yanyun Ding
  • Yuli Zhou
  • Yi Dan


The degradation of biphenol A polycarbonate under the combined action of the photo- and thermal-irradiation in the presence of humidity and oxygen was studied by tensile testing and physicochemical characterizations. A ductile-brittle-ductile transition dissimilar to previously reported aging-induced-embrittlement (ductile-brittle transition) has been revealed in the present article. Further increasing aging time (longer than 650 h) after ductile-brittle transition leads to the rejuvenation in ductile rather than continuous deterioration. Occurring with the second brittle-ductile transition, a competition between oxidation-induced chain scission and crosslinking has also been recorded by FTIR and DSC. Meanwhile, SEM results exclude the possibility that the rejuvenation in ductile is from the change in surface morphology upon aging. Thus, the aging-induced ductile-brittle-ductile transition could result from, at least partly, the competition between oxidation-induced chain-scission and chain crosslinking.

Graphical abstract

Aging induced ductile-brittle-ductile transition in bisphenol A polycarbonate


Biphenol A polycarbonate Ductile-brittle-ductile transition Aging Chain scission Chain crosslinking 



The authors gratefully acknowledge the National Natural Science Foundation of China (No. 51403140 and No. 51133005) for financial support of this research.

Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interest.


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© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Polymer Materials Engineering of China (Sichuan University)Polymer Research Institute of Sichuan UniversityChengduChina

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