Bhavdeep K. Patel

Novel Flame-Retardant Acrylated Poly(Ester-Amide) Resins Based on Brominated Epoxy

Bisphthalamic acids were prepared by reactions of phthalic anhydride and aromatic diamines. Novel flame-retardant poly(ester-amide) resins (FR-PEAs) were prepared by reactions of brominated epoxy resin (BER) with bisphthalamic acids using a base catalyst. The post reactions of these FR-PEAs were carried out with acryloyl chloride. The resultant products are designated as flame-retardant acrylated poly(ester-amide)s (FR-APEAs). The FR-PEAs and FR-APEAs were characterized by element analysis and number average molecular weight determined by nonaqueous conductometric titration. IR spectra for FR-PEAs and FR-APEAs were also carried out. The curing of these FR-APEAs was monitored on a differential scanning calorimeter (DSC) by using benzoyl peroxide as a catalyst. Glass fiber-reinforced composites of FR-APEAs have been fabricated and their chemical, mechanical, electrical and flame-retardant properties have been evaluated. The unreinforced cured samples of FR-APEAs were analyzed thermogravimetrically.

Surface Coating Studies of Alkyd-Castor Oil-Epoxy Resin Condensate-Ketone Resin Blends

Castor oil (CO) was reacted with commercial epoxy resin (ER) (diglycidylether of bisphenol-A, DGEBA) at various mole ratios. The resultant products were designated as COERs and characterized by physical, chemical and IR spectral studies. A commercial alkyd resin was blended with various proportions of COERs and ketone resin (i.e., cyclohexanone-formaldehyde resin) (CHF). All the blends were applied on mild steel panels and characterized for drying time, adhesion, flexibility, hardness, impact resistance and chemical resistance properties.

Interacting Blends of Novel Acrylated Poly(Ester Amide)s Based on DGEBC with Styrene Monomer

Bisphthalamic acids were prepared by reaction of phthalic anhydride and aromatic diamines. Novel poly(ester amide) resins (PEAs) were prepared by reaction between diglycidyl ether of bisphenol-C with bisphthalamic acids using a base catalyst. Post reactions of all these PEAs were carried out with acryloyl chloride. The resultant products are designated as acrylated poly(ester amide) resins (APEAs). The PEAs and APEAs were characterized by elemental analysis and number average molecular weight determined by nonaqueous conductometric titration method. IR spectra of PEAs and APEAs were also recorded. Blending of these APEAs with styrene monomer were carried out. The curing of these APEAs-styrene blends was monitored on a differential scanning calorimeter (DSC) by using benzoyl peroxide as a catalyst. Based on DSC data, glass fiber-reinforced composites of APEAs-styrene blends have been fabricated and their chemical, mechanical and electrical properties have been evaluated. Unreinforced cured samples of APEAs-styrene blends were analyzed thermogravimetrically.

Synthesis, Characterization, and Glass Reinforcement of Flame Retardant Acrylated Poly(Ester-Amide) and Flame Retardant Poly(Ester-Imide) Resins Based on Brominated Epoxy Resin

Bisphthalamic acids were prepared by reaction of phthalic anhydride and aliphatic diamines. Flame retardant poly(ester-amide)s were prepared by reaction of brominated epoxy resin with bisphthalamic acids and post reaction was carried out with acryloyl chloride to obtained acrylated flame retardant poly(ester-amide) resins. Bismaleimides were prepared by reaction between aromatic diamines and maleic anhydride. Carboxy terminated bismaleimides were prepared by Michael addition reaction of bismaleimides and 4-amino benzoic acid. Flame retardant poly(ester-imide)s were prepared by reaction between carboxy terminated bismaleimides and brominated epoxy resin. All the obtained products were characterized and analyzed by making composites.

Synthesis, Characterization and Glass/Carbon Reinforcement of Acetone-Formaldehyde-1,5-Dihydroxynaphthalene-Epoxy Resin System

Acetone-formaldehyde (AF) resin containing the methylol group (–CH2OH) has been prepared and condensed with 1,5-dihydroxynaphthalene (DN) in the presence of an alcoholic alkali catalyst at varying ratios of AF:DN: 1:1, 1:1.5 and 1:2, respectively. The resultant AFDN resins were characterized by elemental analyses, IR spectral studies, and number average molecular weight determined by the nonaqueous conductometric titration method. Further reaction of the AFDN resins was carried out with different epoxy resins (i.e., DGEBA, DGEBC and DGEBF). The curing of these resins was monitored by differential scanning calorimeter (DSC) and their kinetic parameters have been evaluated. Based on DSC thermograms both glass and carbon fiber-reinforced composites have been laminated and characterized for chemical, mechanical and electrical properties. The unreinforced cured resins were subjected to thermogravimetric analysis (TGA).

Interacting Blends of Novel Acrylated Poly(Ester-Amide)s Based on Diglycidylether of Bisphenol-C with Methyl Methacrylate Monomer

Bisphthalamic acids were prepared by reaction of phthalic anhydride and aromatic diamines. Novel poly(ester-amide) resins (PEAs) were prepared by reacting the diglycidylether of bisphenol-C with bisphthalamic acids post reactions; these resins were carried out with acryloyl chloride, and the products were designated as acrylated poly(ester-amide) resins (APEAs). The resins were characterized by elemental analysis and IR spectrum. Blending of APEAs was carried out with methyl methacrylate monomer. Curing of APEAs-MMA blends was monitored using a DSC and glass fiber composites were fabricated and characterized. The unreinforced cured samples of APEAs-MMA blends were analyzed thermogravimetrically.

Interacting Blends of Novel Acrylated Poly(Ester-Amide) Resins - I with Methyl Methacrylate Monomer—Part 1

Bisphthalamic acids were prepared by reaction of phthalic anhydride and aliphatic diamines. Novel poly(ester-amide)s (PEAs) were prepared by reaction of epoxy resin with bisphthalamic acids. Acrylation of PEAs were carried out using acryloyl chloride; products are called acrylated poly(ester-amide)s (APEAs). Elemental analysis, Number average molecular weight and IR spectra recorded for both PEAs and APEAs. Blending of APEAs was carried out with methyl methacrylate monomer. Curing of APEAs-MMA blends were monitored on differential scanning calorimeter. Composites of these blends have been laminated and characterized. Unreinforced cured samples of these blends were analyzed thermogravimetrically.

Synthesis, Characterization and Glass Reinforcement of Urea-Formaldehyde-Phenol Resins

N,N′-dimethylolurea (DMU) was prepared and condensed with phenol (P) in the presence of alcoholic alkali catalyst at varying mole ratios of DMU: P, namely 1:1, 1:1.5 and 1:2. The resultant DMUP resins were characterized by elemental analysis, IR spectral studies, number average molecular weight estimated by nonaqueous conductometric titration and thermogravimetry. The curing study of DMUP resins with hexamethylenetetramine (HEXA) was monitored by differential scanning calorimeter (DSC) and kinetic parameters were evaluated. Glass-reinforced composites based on DMUP-HEXA systems have also been prepared and characterized for chemical, mechanical and electrical properties.

Synthesis, Characterization and Glass Reinforcement of Dimethylolurea-3-AminoPhenol-Epoxy Resin Curing Systems

N,N′-Dimethylolurea (DMU) was prepared and condensed with 3-aminophenol (AP) in the presence of alcoholic alkali catalyst at varying mole ratios of DMU: AP. The resultant dimethylolurea-3-aminophenol (DMUAP) resins were characterized. DMUAP-epoxy curing systems have been prepared by mixing DMUAP and epoxy resin (DGEBA) in different proportions. The curing study of DMUAP-epoxy systems was monitored on DSC and kinetic parameters were evaluated. Based on DSC data, glass-reinforced composites of DMUAP-epoxy systems have been laminated and characterized. The unreinforced cured material of DMUAP-epoxy systems were analyzed by thermogravimetric analysis (TGA).

Interacting Blends of Flame-Retardant Acrylated Poly(Ester-Amide) Resins Based on Brominated Epoxy Resin with Methyl Methacrylate and Styrene

Bisphthalamic acids were prepared by reaction between phthalic anhydride and diamines. Flame-retardant poly(ester-amide)s (FR-PEAs) were prepared by reaction between bisphthalamic acids and brominated epoxy resin. Acrylation of FR-PEAs gives flame retardant acrylated poly(ester-amide)s (FR-APEAs). FR-PEAs and FR-APEAs were characterized by IR spectra, elemental analysis and number average molecular weight. Blending of FR-APEAs with methyl methacrylate and styrene was carried out. Curing study of these blends was monitored by Differential Scanning Calorimeter (DSC). Based on DSC data, glass and carbon reinforced composites have been laminated and characterized. The unreinforced cured samples were subjected to thermogravimetric analysis.