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The synthesis and structure of olygomers based on phenol-formaldehyde resins and montmorrilonite, the influence of concentration and acidity on their structures

3rd International Conference on Polymer Science and Engineering
October 02-03, 2017 Chicago, USA

Denys O Savchenko, Eugene O. Paschenko, Andrey N. Chernenko, Olga V. Lazhevskaya, Vyacheslav. V. Bichihin and Nikolay N. Nekoval

V. Bakul Institute for Superhard Materials, Ukraine

Posters & Accepted Abstracts: Polym Sci

Abstract:

Introduction: Montmorrilonite is one of the fillers for polymers that are studied now. It attracts scientists due to the following reasons: 1) improvement of polymeric materials properties due to filler introducing 2) particularities of montmorrilonite behavior in polymer melts and solutions 3) abundance and availability of the mineral Introduction of montmorrilonite into polymers and olygomers may improve their mechanical properties, heat-resistance, gas selectivity (for membranes), compatibility of polymers, and accelerate relaxation process and reduce water absorption. Polymeric composite materials based on montmorrilonite can be applied for electrochemical sensors, drug delivery systems, packaging materials, sorbents, etc. However there are no literature data about application of such polymeric composite materials as binders for grinding tools. In addition, there is no enough information about structure peculiarities of olygomers based on phenol-formaldehyde, containing montmorrilonite. Objectives of this work were: 1) to make the synthesis of olygomers based on phenol-formaldehyde and montmorrilonite, 2) to study olygomer structures and the influence of concentration of montmorrilonite and alkali on them, 3) to provide a substantiate preposition about a chemical reaction mechanism of olygomer formation. Experimental part: the synthesis of olygomers was conducted in seven steps: 1) the water was added to montmorrilonite, 2) phenol-formaldehyde was dissolved in alkaline medium and a catalyst was added to it, 3) both mixtures were heated and stirred during 30 days, 4) montmorrilonite sorbed the water was added in portions to the phenol-formaldehyde solution 5) the obtained system was heated and stirred as well 6) during heating and stirring the residue of olygomer has formed 7) olygomer was filtered and dried. The structure of olygomer was studied with IR-spectra. Findings: Olygomers based on phenolformaldehyde, containing silica-alumina layers of montmorrilonite were synthesized. Synthesized olygomers were of three structure types: 1) aromatic rings of phenol-formaldehyde are coordinated around silica atoms of silica-alumina layers 2) metoxyl and hydroxyl groups are coordinated around silica-oxide groups of above mentioned layers 3) phenol-formaldehyde chains are chemically bound with such layers via Si-O-C bonds.

Biography :

Denys Savchenko is a passionate chemical researcher. He studies development of materials for grinding tools. In 2014 he got PhD in Material Sciences. His research is dedicated to the study of the polymer structure and improvement of heat-resistance and mechanical properties of materials based on polymers.