Abstract
This article presents the results of investigation into receiving amide modification agents of smectic clays, used as nanofillers in polymer nanocomposites. Prepared materials were obtained on the base of terephthalic and isophthalic acids and simple aliphatic amines. Such structure makes them good layered silicates modifying agents as well as makes them well affiliate to structure of polymers containing aromatic, carbonyl, amide, etc. groups. Obtained compounds were introduced into clays’ structure in protonated form, according to formulated method. Conducted research confirmed that the modification of montmorillonite clay (MMT) with received compounds had taken place. In order to establish that fact elementary analysis and X-ray diffraction (XRD) methods were used. Modificator molecules must display thermal resistance in full range of polymer processing temperatures. To investigate these properties the Thermogravimetric analysis (TG) of obtained compounds was carried out. These studies indicate that among the obtained compounds there were the ones with thermal stability over 523 K. Thermal resistance makes it possible for these substances to be used in poly(ethylene terephthalate) processing.
Highlights
IntroductionPolymer nanocomposites have got several properties (e.g., an increased flame retardancy) that make them more appealing to introduce in commonly used products than non-composite polymer materials
Polymer nanocomposites have got several properties that make them more appealing to introduce in commonly used products than non-composite polymer materials
This article presents the results of investigation into receiving amide modification agents of smectic clays, used as nanofillers in polymer nanocomposites
Summary
Polymer nanocomposites have got several properties (e.g., an increased flame retardancy) that make them more appealing to introduce in commonly used products than non-composite polymer materials. The most common method is to modify the surface of the clay with specific modifying agents. There are well-known aliphatic clay modifiers (the most common are, e.g., protonated primary alkyloamines, quaternary alkylammonium salts, quaternary phosphonnium salts), applied in the process of obtaining polyolefin composites, but there is still lack of publicized researched concerning aromatic modifiers [7]. Aromatic groups in their structure becomes clay modifying agents and make them moleculary compatible to selected polymers, e.g., poly(ethylene terephthalate). Precipitated pink (MEI) and white (DEI and DBI) products were filtered, washed with solvent and dried for 24 h at 353 K temperature. Modification of MMT with MET, MBT, DET, DBT, MEI, DEI, DBI lead to obtain products denoted as MMT– MET, MMT–MBT, MMT–DET, MMT–DBT, MMT–MEI, MMT–DEI, MMT–DBI, respectively
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