132010-76-5Relevant academic research and scientific papers
Thermo-mechanical and dielectric properties of graphene reinforced caprolactam cardanol based benzoxazine-epoxy nanocomposites
Sethuraman,Alagar
, p. 9607 - 9617 (2015)
In the present work a new type of benzoxazine was synthesized using caproamine with cardanol and the molecular structure was characterized by FTIR and NMR spectroscopy. The graphene reinforced epoxy-polybenzoxazine nanocomposites were prepared by incorporating varying weight percentages of graphene and benzoxazine to an epoxy resin. Data obtained from the mechanical study infer the significant improvement in the values of tensile strength, impact strength and flexural strength of the composites reinforced with different weight percentages of benzoxazine and graphene. The values of the dielectric constant of the composite samples are appreciably enhanced and are higher than that of the neat epoxy matrix. Data from SEM, TEM and XRD ascertain the existence of homogeneous distribution of graphene in the composites. Data obtained from thermal, mechanical, dielectric and surface free energy studies infer that 20 wt% Bz-g reinforced composites possess better properties than those of the neat epoxy matrix and other weight percentages of composites.
Development of a polybenzoxazine/TSBA-15 composite from the renewable resource cardanol for low-k applications
Selvaraj, Vaithilingam,Jayanthi,Lakshmikandhan, Thatchanamurthy,Alagar, Muthukaruppan
, p. 48898 - 48907 (2015/06/16)
The current work describes the synthesis of a novel cardanol-based benzoxazine monomer (CBz) from the renewable resource cardanol using caprolactamdiamine (CPLDA) by a solvent-free method. Thiol-functionalized mesoporous silica (TSBA-15) was incorporated into the cardanol-based benzoxazine matrix (PCBz) and the structure of thiol-functionalized mesoporous silica/cardanol based polybenzoxazine(TSBA-15/PCBz) composite was confirmed by FT-IR and NMR analysis. The surface morphology of TSBA-15/PCBz was determined using SEM and TEM. From the TEM results, it was observed that the dispersion of thiol-functionalized mesoporous silica into PCBz forms a fibrous material containing free volume. The thermal properties of this fibrous materials were studied by using differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA). The thermal properties were observed to depend on the weight percentage of the TSBA-15 material. Dielectric data obtained from impedance analysis shows that the TSBA-15/PCBz composites have lower dielectric constant values, and dielectric loss than that of neat PCBz material. The results indicate that TSBA-15/PCBz composites obtained in a renewable manner from waste cardanol can find applications in microelectronics as electrical resistors.
Thermo-mechanical and surface properties of POSS reinforced structurally different diamine cured epoxy nanocomposites
Sethuraman,Prabunathan,Alagar
, p. 45433 - 45441 (2015/01/09)
In the present study three structurally different diamines namely bisphenol-A based ether diamine, octane diol based ether diamine, and capron based diamine were synthesized and characterized using FT-IR, 1H-NMR and 13C-NMR spectra. These diamines were used to cure DGEBA epoxy resin and were reinforced with NH2-POSS in different weight percentages (1%, 3% and 5% wt) to obtain epoxy matrices and composites. Data obtained from thermo-mechanical, dielectric and surface studies were compared with those of neat epoxy matrix cured with diamino diphenyl methane (DDM). The surface morphology was ascertained from the XRD and SEM analysis and the presence of POSS in the composites was ascertained from the TEM images. The capron based diamine cured epoxy matrix shows better improvement in tensile strength and impact strength of 39.8% and 137.0% respectively than those of neat epoxy cured with diamino diphenyl methane (DDM). The value of contact angle (91.3°) of the capron based diamine cured epoxy composites infers that the epoxy matrix becomes hydrophobic nature. Data obtained from different studies suggest that the capron diamine cured epoxy matrix can be used in the form of a coating, encapsulant, or a sealant for different industrial and engineering applications for better performance and improved longevity. This journal is
Structure-activity relationships of acetylcholinesterase noncovalent inhibitors based on a polyamine backbone. 3. Effect of replacing the inner polymethylene chain with cyclic moieties
Tumiatti, Vincenzo,Andrisano, Vincenza,Banzi, Rita,Bartolini, Manuela,Minarini, Anna,Rosini, Michela,Melchiorre, Carlo
, p. 6490 - 6498 (2007/10/03)
In the present paper we expanded SAR studies of 3, the ethyl analogue of the AChE inhibitor caproctamine (2), by investigating the role of its octamethylene spacer separating the two amide functions through the replacement with dipiperidine and dianiline
