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Nanotechnology has emerged as a subject of immense academic interest and excitement in the past few decades. The immediate goal of this science aims at the production of high performance nanomaterials. The present study reports comparative investigations on the in situ polymerization of polyaniline (PANI), and its derivatives poly(1‐naphthylamine) (PNA) and poly(o‐toluidine) (POT) within the camphor sulphonic acid (CSA) modified montmorillonite (MMT) layers. The polymerization as well as intercalation of the conducting polymers was confirmed by FT‐IR, UV‐visible spectroscopies, and XRD studies, whereas the morphology of the nanocomposites was analyzed by TEM studies. It was found that the PANI derivatives (PNA and POT) revealed higher intercalation as compared with PANI. The morphology of nanocomposites was found to be governed by the type of conducting polymer intercalated. A large variation in the morphology as well as particle size was observed between the nanocomposites of PANI and its derivatives. The conductivity was found to be in the range of 10−3–10−2 S·cm−1. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers

ABSTRACT:The efficient utilization of inherently conducting polymers in nanotechnological applications faces challenges in processing them into highly ordered structures that yield novel properties. This paper reports a comparative study on the nanocomposites of poly(1-naphthylamine) (PNA), having a fused aromatic ring, and its conductive nanocomposites with polyvinyl alcohol (PVA) and polyvinyl chloride (PVC). The composites were prepared by two different methods: (a) dispersion of PNA in PVA and (b) in situ polymerization of PNA in PVC. These nanocomposites were characterized by UV-visible spectroscopy, TEM, stress, strain, and conductivity measurements. The variation in the nanostructured morphology of PNA particles in PVA as well as PVC matrix in the CHARACTERISTICS OF NANOSTRUCTURED COMPOSITES OF POLY(1-NAPHTHYLAMINE)two cases resulted from the pronounced interaction of PNA with PVA through hydrogen bond, forming a homogeneous matrix that facilitates the formation of a self-assembled network of PNA nanoparticles. In case of PNA/PVC composite, a discrete, agglomerate-free distribution of PNA particles was obtained. The results revealed that an appropriate choice of synthesis conditions offers a possibility to improve not only the processability but also the pattern of distribution as well as the stability of PNA particles.

Abstract.Synthesis of polymeric materials from renewable resources has attracted the attention of researcher worldwide as they are not only reducing the dependency on petrochemicals, a finite resource but also friendly to the environment. Synthesis of valuable polymers from non-conventional and non-edible vegetable oils solves the problem of waste disposal as well as bringing down the cost of end products. Melia azedarach seed oil (MASO), a non-traditional, non-edible and abundantly available resource is utilized for the synthesis of poly (ester-amide) (MAPEAA) by the aminolysis with diethanolamine followed by step-growth polymerization with adipic acid. The MAPEAA polymeric resin was characterized by physic-chemical analyses as per standard reported laboratory methods. The structural elucidation of the resin was carried out by spectral analyses. Physicomechanical and chemical/corrosion resistance performances of the resin were also investigated. Keywords:Melia azedarach seed oil, renewable resource, vegetable oil, Poly (ester-amide) IntroductionThere have been potential demands worldwide for replacing petroleum based raw materials with the renewable ones [1][2][3]. This is quite significant from the societal and environmental points of view. Among different renewable resources vegetable oils obtained from seeds of various plants are in the spotlight of the chemical industries as they are the abundantly available in nature and also show low eco-toxicity as well as low-toxicity towards humans [4,5]. Common traditional seed oils such as linseed, sunflower, castor, soybean, coconut are being largely used in the synthesis of polymers like alkyds, epoxies, polyurethanes, interpenetrating polymer networks (IPN)s, poly (ester-amide)s and many others [4,[6][7][8][9][10]. These polymers are extensively used as coatings, adhesives, insulators and biomedical structures. However, among afore mentioned traditional oils some of them possess medicinal values and are edible too [11,12]. Therefore, it is important to explore the gift of the nature and utilize the non-edible and non-conventional seed oils as starting raw materials for the development polymers, which ultimately reduce the demands of conventional vegetable oils. Melia azedarach belongs to the family meliaceae largely cultivated in rural areas due to its valuable wood [13,14]. The seeds of plants contain about 40-wt % triglyceride oil with sufficiently high iodine value, which provide the film formation ability to the synthesized polymers [13,14]. Meagre utilization of Melia azedarach seed oil, especially in the polymer syntheses encourages us to utilize this triglyceride oil in the synthesis of poly(ester-amide) using adipic acid as a dibasic acid [14][15][16].Poly (ester-amide)s of vegetable oil origin are amide modified alkyds and have hybrid properties of both functionalities pendent amide and repeating ester; consequently show better performances than normal alkyds in terms of hardness, water vapor resistance and corrosion resistance [9,12]. In present work eff...