Relationship between the end-cap structure of polycarbonates and their impact resistance

Using various phenols as the end-capping agent, polycarbonates (PCs) with the same degrees of polymerization were prepared by phosgenation of bisphenol A. The end-capping agents greatly affected the fluidity, thermal resistance and impact resistance of the PCs. It was found that, compared to commerc...

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Bibliographic Details
Published inPolymer (Guilford) Vol. 42; no. 20; pp. 8355 - 8359
Main Author OKAMOTO, Masaya
Format Journal Article
LanguageEnglish
Published Oxford Elsevier 01.09.2001
Subjects
Applied sciences
Exact sciences and technology
Mechanical properties
Organic polymers
Physicochemistry of polymers
Properties and characterization
Substituent effect
Bisphenol A
End group
Impact strength
Preparation
Mechanical properties
Phenols
Interfacial polymerization
Termination reaction
Experimental study
Polycarbonate
Rheological properties
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Summary:Using various phenols as the end-capping agent, polycarbonates (PCs) with the same degrees of polymerization were prepared by phosgenation of bisphenol A. The end-capping agents greatly affected the fluidity, thermal resistance and impact resistance of the PCs. It was found that, compared to commercially available PCs end-capped with 4-tert-butylphenol, the PCs end-capped with 4-tert-octylphenol or 4- alpha -cumylphenol were superior in impact strength with a better balance of fluidity, thermal resistance and impact resistance. From the results of dynamic mechanical measurements, improvement in performance is explained by the high mobility of my prepared PCs as compared to commercial ones, that is, energy dissipation occurs significantly in the polymer molecule, and contributes to the improvement in impact resistance.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(01)00345-7