Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 3, Pages 1188-1198Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta04841e
Keywords
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Funding
- National Natural Science Foundation of China [51173012]
- Beijing Municipal Commission of Education
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The facile controlled synthesis of an epoxide-terminated hyperbranched aromatic polyether (EHBPE) that is suitable for mass production is demonstrated using a one-pot A(2) + B-3 approach by taking advantage of competing reactions. When used as toughener for the DGEBA/TETA curing system, non-phase-separated hybrids with notable improvements in toughness are obtained. Moreover, the addition of EHBPE also simultaneously improves the glass transition temperature (T-g) and tensile strength. T-g, tensile strength, impact strength, glassy modulus, and fractional free volume are found to increase with EHBPE loading up to 10%. Explanations for the three enhancements are provided. More importantly, the toughening mechanisms for the non-phase-separated hybrids are outlined in detail for the first time.
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