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Review on the Preparation and Properties of Clay-based Nanocomposites with Covalently-bound Polymer Architecture

David P. Penaloza Jr.*

Chemistry Department, College of Science,
De La Salle University, Manila 1004 Philippines

*Corresponding Author: This email address is being protected from spambots. You need JavaScript enabled to view it.

 

 

ABSTRACT

The concept of tethering polymer chains on a solid substrate has attracted considerable attention from both practical and theoretical points of view. Materials with covalently bound polymer architecture are often referred to as polymer brushes.  Polymer brushes, typically prepared either through “grafting to” or “grafting from” approaches, have interesting mechanical and chemical properties and represent a class of materials that can provide a wide range of applications that include stabilization of colloids, adhesion, and polymer coatings. In this review, two general methods of preparing polymer brush nanocomposites were discussed leading to covalently end-tethered polymer architecture and the resulting properties exhibited by these hybrid materials.

INTRODUCTION

The interest in polymer nanocomposite materials has grown in recent years because of their excellent properties. By incorporating inorganic fillers like layered silicate clays in polymers, the resulting hybrid materials have better physical properties over their neat polymers and conventional composite counterparts (Alves et al. 2019; Hasegawa et al. 1998; Javaid et al. 2018; Kouser et al. 2018; Medhat Bojnourd and Pakizeh 2018; Penaloza 2019a, 2019b; Penaloza and Seery 2019; Powell and Beall 2006; Usuki et al. 1997; Yano et al. 1993, 1997). These physical property enhancements include higher modulus and strength plus flame retardant, barrier, and optical characteristics (Arjmandi et al. 2016, Chiu et al. 2004, Cui et al. 2015, Follain et al. 2016, Kong et al. 2017, Lan and Pinnavaia 1994, Martino et al. 2017, Ogawa and Kuroda 1997, Pramanik et al. 2003, Sharma et al. 2017, Takahashi et al. 2017, Yeh et al. 2001, Yoon et al. 2003). Also, the random dispersion of individual silicate platelets of about nanometer thickness in a polymer resin results in additional properties like flame retardancy, enhanced barrier properties and ablation resistance that are not displayed in either of the components (Alexandre and Dubois 2000, Cui et al. 2015, Das et al. 2017, Giannelis 1996, Guin et al. 2015, Liu et al. 2015). . . . read more

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