Synthesis and Characterization of Copolymers and Nanocomposites from Limonene, Styrene and Organomodified-Clay Using Ultrasonic Assisted Method.
Hodhaifa DerdarGeoffrey Robert MitchellSarra ChaibedraaVidhura Subash MahendraZakaria CherifiKhaldoun BachariRedouane CheboutFouzia TouahraRachid MeghabarMohammed BelbachirPublished in: Polymers (2022)
In the present work, we report a simple synthesis method for preparation of copolymers and nanocomposites from limonene and styrene using clay as a catalyst. The copolymerization reaction is carried out by using a proton exchanged clay as a catalyst called Mag-H + . The effect of temperature, reaction time and amount of catalyst were studied, and the obtained copolymer structure (lim-co-sty) is characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance spectroscopy ( 1 H-NMR) and differential scanning calorimetry (DSC). The molecular weight of the obtained copolymer is determined by gel permeation chromatography (GPC) and is about 4500 g·mol -1 . The (lim-co-sty/Mag 1%, 3%, 7% and 10% by weight of clay) nanocomposites were prepared through polymer/clay mixture in solution method using ultrasonic irradiation, in the presence of Mag-CTA + as green nano-reinforcing filler. The Mag-CTA + is organophilic silicate clay prepared through a direct exchange process, using cetyltrimethylammonuim bromide (CTAB). The prepared lim-co-sty/Mag nanocomposites have been extensively characterized by FT-IR spectroscopy, X-ray diffraction (XRD), scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM). TEM analysis confirms the results obtained by XRD and clearly show that the obtained nanocomposites are partially exfoliated for the lower amount of clay (1% and 3% wt) and intercalated for higher amounts of clay (7% and 10% wt). Moreover, thermogravimetric analysis (TGA) indicated an enhancement of thermal stability of nanocomposites compared with the pure copolymer.
Keyphrases
- reduced graphene oxide
- high resolution
- visible light
- carbon nanotubes
- gold nanoparticles
- single molecule
- high speed
- ionic liquid
- room temperature
- mass spectrometry
- magnetic resonance
- highly efficient
- multidrug resistant
- electron microscopy
- solid state
- hyaluronic acid
- physical activity
- metal organic framework
- radiation therapy
- carbon dioxide
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- liquid chromatography
- data analysis