In recent years, environmentally friendly substituted raw materials
for preparing polymers have become needs with the development of material
science. Many specific investigations were focused on polymer materials based
on renewable resources. The main achievement is devoted to the preparation of polyol
from plant sources due to its wide availability, economical and eco-friendly
characteristics. Several bio-based materials, including cellulose, starch,
natural oil, and sugar, have been utilized as starting material for
polyurethanes. Vegetable oils are among the most promising, because of
they are an inexpensive, readily available and renewable resource.  The six common fatty acids are palmitic (C 16 :
0), stearic (C 18 : 0), oleic (C 18 : 1), linoleic (C 18 : 2), linolienic (C 18
: 3), and recinoliec  (C 18 : 1 OH )acids
( in this notation, the first number represents the number of carbon atoms, the
second number represents the number of C-C double bonds, and OH represents
hydroxyl groups in fatty acid). The reactive sites are ester bonds, C=C,
and hydroxyl group which exist in some oils. All the vegetable oils have been
extensively studied for the production of polyols and polyurethanes.

In this paper, we report on the
development of polyols by the oxirane ring opening  technique. The oxirane ring opening is an
important class of organic equilibrium exchange reaction in which one epoxy
ring opened by another fatty acid moiety. In the epoxidation of  vegetable oils, the triglyceride reacts with
methanoic acid followed by addition of peroxide and this process is often
called epoxidation. Hence, they are several aspects included such as, the type
of polyol preparation, the carboxyl to 
epoxy  mole ratio and temperature
have influence on the progress of the reaction. The recinoleic fatty acid is
obtained directly via saponification 
of  castor oil, that is by
treatment of the oil with alkali in the presence of HCl as a neutralizing
agent. The preparation method follows, variety of vegetable oils are prepared
to polyols, such as, castor oil fatty acid
(CaOFA) was used to ring- opening to 
epoxy groups in  epoxidised sesame
oil (ENO), epoxidised peanut oil (EJO). The present
communication deals with the effect of ring-opening duration newly synthesized polyurethane (PUs) such as TNCP and TJCP
derived from NCOL and JCOL, their structures and functionalities were
characterized by the FT- IR,1H NMR, 13C NMR and the
viscosity of the polyols were characterized by Rheometry. The present communication deals with synthetic and thermal
degradation properties of a newly synthesized polyurethane (PUs) such as TNCP
and TJCP derived from NCOL and JCOL.  The
Freeman-Carroll’s methods have been applied for the calculation of kinetic
parameters from thermogravimetry (TGA) curve. They has been discussed thermal
degradation curve in order to determine their mode of decomposition, order of
reaction, apparent activation energy, free energy change, entropy change.

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