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Study properties of nanocomposites prepared with new polyimides and reactive nanosilica by epoxide functionalization
Author(s) -
Alizadeh Raouf,
Ghaemy Mousa,
Bazzar Maasoomeh
Publication year - 2015
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.22971
Subject(s) - materials science , nanocomposite , thermal stability , solubility , epoxide , surface modification , polymer , ultimate tensile strength , dynamic mechanical analysis , chemical engineering , composite material , polymer chemistry , organic chemistry , chemistry , catalysis , engineering
In this article, new types of organosoluble polyimides, poly(carbazole‐quinoxaline‐imide)s (PCQI), were synthesized and used in preparation of nanocomposites with modified nanosilica (mNS). The synthesized polyimides bearing different solubilizing functional moieties were casted into thin films at room temperature. SiO 2 nanoparticles were surface modified with γ‐glycidoxypropyltriethoxysilane (GPTES) to obtain mNS containing epoxide functional groups. The PCQI/mNS nanocomposites were prepared via cure reaction of epoxide groups and polymer functional units. The PCQIs and nanocomposites films were tested for different properties including thermal using TGA and DMTA, mechanical, thermomechanical, photophysical, solubility, water uptake, and metal ions adsorption. The strong chemical bonding between mNS particles and polymer matrix reduced solubility of nanocomposite and enhanced thermal stability in term of 10% weight loss temperature ( T 10% , from 509°C to 582°C) and tensile strength (from 110 MPa to 155 MPa). These polyimides and nanocomposites were also efficient chelating agents for removal of metal ions such asCr 2 O 7 2 −, Cr 3+ , Pb 2+ , Cd 2+ , and Hg 2+ from aqueous solutions either individually or in the mixture and at different pH values. POLYM. COMPOS. 36:545–555, 2015. © 2014 Society of Plastics Engineers