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Cashew nut oil8/8/2023 Moreover, it can be polymerised through the unsaturation in the side chain although the bulky nature of the side chain restricts the molecular weight attainable to oligomers. It undergoes the well known formaldehyde condensation reaction of phenols that gives rise to phenolic polymers. Cardanol differs from phenol only in the C15 side chain. Property advantage over phenolics in certain applications such as impact resistance, flexibility, faster heat dissipation etc.ĬNSL undergoes all the conventional reactions of phenols. Possibilities for Development of High Performance Polymers. Versatility in Polymerisation and Chemical Modification. Polymerisation after Chemical Modification to introduce speciality properties. Structural Features for Transformation into High Performance Polymers.ĬNSL can be polymerised by a variety of methods:Īddition Polymerisation through the side chain double bonds using cationic initiators such as sulphuric acid, diethylsulphate etc.Ĭondensation Polymerisation through the phenolic ring with aldehydic compounds. Improved Flexibility and reduced brittleness. Thus, CNSL offers vast scope and opportunities for the production of speciality chemicals, high value products and polymers. This involves a value addition of many orders of magnitude and the chemical transformation provides 100% chemically pure products. Recent research has shown that the constituents of CNSL possess special structural features for transformation into speciality chemicals and high value polymers. Its versatility stems from its innumerable applications in many areas. Being renewable, it offers much advantage over synthetics. In the search for the cost effective modern materials, CNSL and its products have a significant role to play. It is called the cashewnut shell liquid, which is the pericarp fluid of the cashewnut. The nut has a shell of about 1/8 inch thickness inside which is a soft honeycomb structure containing a dark reddish brown viscous liquid. Cashewnut shell liquid is a by-product of the cashew industry.
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