Synthesis and Characterization of Ricinoleamide‐Based Polyurethane

Abstract

Ricinus communis (RC) oil-based materials are currently receiving increasing attention because of economic and environmental concerns. In the present work, RC oil-a natural triol has been utilized for the development of an advanced polymeric material-poly(urethanericinoleamide) (PUR) through very simple synthesis and curing strategy, omitting derivatization steps or side reactions, chain extenders and crosslinkers. The synthesis of PUR was carried out in two steps. The first step is the introduction of an amide group in the RC oil (89.5% ricinoleic acid) via base catalyzed amidation, which results in N, N-bis (2-hydroxyethyl) ricinoleamide (HERA). The second step is urethanation of HERA by the reaction of toluene-2,4-diisocyanate (TDI) in minimal possible organic solvent by one-shot technique, which results in the formation of polyurethane along with amide linkages. The physico-chemical and spectral studies (FT-IR, 1 H-NMR and 13 C-NMR techniques) confirm these two reactions and the structure of PUR. The resin was cured at ambient temperature without any cross linker. Solubility of the resin was investigated in different polar and non-polar solvents. Thermo-gravimetric analysis (TGA)/differential thermal analysis (DTA) and Differential Scanning Calorimetry (DSC) were used to determine the thermal stability and curing behavior of PUR. An ambient cured ricinoleamide modified polyurethane resin exhibited thermal resistance up to 200-220°C.

Soybean Oil‐Based Polyurethane Networks: Shape‐Memory Effects and Surface Morphologies

“…Vegetable oil-based polyurethanes, which are mostly synthesized by reacting vegetable oil polyols with diisocyanates, have received significant interest as one group of important bioproducts [6][7][8]. Vegetable oil double bonds are usually utilized to generate hydroxyls to form polyols [9,10]. Since several double bonds are present in vegetable oils, the functionality of vegetable oil polyols (the average number of hydroxyls per molecule) is usually higher than two [8,11].…”

Effect of danling chain content on properties of 10-undecenoic acid-based polyurethane

“…In comparison, the content of dangling chain has a little impact on the thermal stability of the obtained PUs. We can see from Fig.3, the polyurethane prepared all has 3 thermal decomposition stage, respectively for the decomposition of carbamate bond [12,13] , soft segment decomposition and decomposition of ester bond [7] . Fig.4.…”

Linseed oil derived terpolymer/silica nanocomposite materials for anticorrosive coatings

“…The peak at 4.36 ppm was attributed to CH 2 attached to urethane oxygen (CH 2 OCONH‐Ar) and peak at 2.4 ppm can be owed to CH 3 of TDI. [ 29 ] The peak at 4.0 ppm was related to the CH 2 attached to Si (5, CH 2 ─O─Si─O).…”