NOPR Collection:

Measurement and comparison of cohesion of silk filaments in silk strands

1989-12-01T00:00:00Z

Title: Measurement and comparison of cohesion of silk filaments in silk strands Authors: Manna, S S; Sengupta, D; Rao, G Subba Abstract: A new method of determining the cohesion of silk filaments in a silk strand is described. The method has been used to compare the cohesion of the filaments of two races of silk, viz. P₅ × NB₁₈ and N × G, and it is observed that the race P₅ × NB₁₈ is superior to the race N × G. Page(s): 191-192

Potassium monopersulphate-initiated grafting of acrylic acid onto jute fibres

1989-12-01T00:00:00Z

Title: Potassium monopersulphate-initiated grafting of acrylic acid onto jute fibres Authors: Samal, R K; Samal, R N; Dash, Sabyasachi; Samantaray, H S Abstract: Graft copolymerization of acrylic acid onto jute fibres was carried out using KHSO₅ as initiator and Fe(II)as catalyst in an aqueous medium under nitrogen atmosphere and it was observed that graft yield is affected by the reaction time, temperature, monomer conc., initiator conc., catalyst conc., reaction medium and base polymer. Grafting was carried out in presence of various salts and organic solvents. The maximum graft yield obtained was 76.2%. Various properties of the graft copolymers were also studied. A suitable mechanism for the decomposition of the initiator and graft initiation and termination has been suggested. Page(s): 187-190

Synthesis of azodisperse dyes from 2-bis styryl-6-amino-4-oxoquinazoline and their application on polyester fibres

1989-12-01T00:00:00Z

Title: Synthesis of azodisperse dyes from 2-bis styryl-6-amino-4-oxoquinazoline and their application on polyester fibres Authors: Naik, N M; Desai, K R Abstract: Nine azodisperse dyes were prepared by coupling diazotized 2-bis styryl-6-amino-4-oxoquinazoline with various naphthol derivatives and their dyeing performance on polyester fibres was assessed. All the dyes showed fair to good light fastness, very good to excellent wash fastness and poor to moderate %exhaustion. Page(s): 184-186

Synthesis of azodisperse dyes with pyridine ring for dyeing polyester fibres-Part II

1989-12-01T00:00:00Z

Title: Synthesis of azodisperse dyes with pyridine ring for dyeing polyester fibres-Part II Authors: fadda, A A; Elagizy, S A Abstract: Nineteen arylazo derivatives of malonyl-α-aminopyridine have been prepared for use as dyestuffs. The effect of the nature and orientation of substituents in the diazonium component on the colour of azo dyes is discussed. The dyeing performance of these dyes on different fibres has also been assessed. Page(s): 177-183