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Fabrication and characterization of novel hyperbranched polyimides with excellent organosolubility, thermal and mechanical properties.

Fabrication and characterization of novel hyperbranched polyimides with excellent organosolubility, thermal and mechanical properties.

Authors :
Chen, Wenqiu
Li, Quantao
Zhang, Quanyuan
Xu, Zushun
Wang, Xianbao
Yi, Changfeng
Source :
Journal of Applied Polymer Science; Mar2015, Vol. 132 Issue 9, pn/a-N.PAG, 13p
Publication Year :
2015

Abstract

ABSTRACT A series of amine-terminated and anhydride-terminated hyperbranched polyimides (HBPIs) were successfully prepared with various commercial dianhydrides and a novel BB′<subscript>2</subscript>-type aromatic triamine, 2,4,6-tris[4-(4-aminophenoxy)phenyl]pyridine, with a symmetrical triaryl-substituted pyridine segment and prolonged flexible linkages. The chemical structure of the triamine monomer and the hyperbranched structure of the resulting polymers were verified by Fourier transform infrared spectroscopy and <superscript>1</superscript>H-NMR spectroscopy. The resulting HBPIs, which mainly held an amorphous morphology, exhibited improved organosolubilities in several strong polar aprotic solvents, good heat resistance with glass-transition temperature values in the range 218.6-311.0°C, and excellent thermal stabilities in both N<subscript>2</subscript> and air [the temperature at 5% weight loss ( T<subscript>5%</subscript>) in N<subscript>2</subscript> was higher than 529.8°C and the T<subscript>5%</subscript> in air was higher than 465.1°C]. The obtained HBPI films also showed outstanding mechanical properties with tensile strength, tensile modulus, and elongation at break values of 86.4-101.3 MPa, 1.73-2.04 GPa, and 5.07-10.67%, respectively; considerable optical transparency; low water absorption; and neutral interface wettability. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 41544. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00218995
Volume :
132
Issue :
9
Database :
Complementary Index
Journal :
Journal of Applied Polymer Science
Publication Type :
Academic Journal
Accession number :
99760190
Full Text :
https://doi.org/10.1002/app.41544