studies on natural rubber-bound diphenylamine antioxidants
Studies on natural rubber-bound diphenylamine antioxidants
Natural rubber-bound diphenylamine antioxidants 255 after ageing with a concentration of antioxidant. The tensile strength retention is found to increase with the amount of chemically bound anti- oxidant, reaches a maximum, and then levels off.
ber. Scott - Dyuthi CUSAT
Studies on natural rubber-bound diphenylamine antioxidants S. Avirah & R. Joseph Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin 682 022, India (Received 31 January 1994; revised versions received 10 May and 30 June 1994; accepted 3 July 1994)
New oligomer‐bound antioxidants in natural rubber
Studies on natural rubber-bound diphenylamine antioxidants. Article. The effect of rubber bound antioxidant and ordinary antioxidant on the Mooney scorch time has been studied by means of the
Studies on polyisobutylene bound paraphenylene diamine
Natural rubber bound diphenylamine antioxidants were reported by Avirah and Joseph . Polymer bound antioxidants have many advantages but one main disadvantage is that the mobility of the network-bound antioxidants is restricted. Hence it does not bloom to the surface and ozone attack cannot be effectively controlled . Most of the polymer bound
STUDIES ON POLYMER BOUND ANTIOXIDANTS
studies on polymer bound antioxidants natural rubber bound diphenylamine and its use in natural rubber filled vulcanizates iii 44 72 74 103 118 153 154. part ii:
Preparation and Characterisation of Novel Polymer Bound
The rubber-bound diphenylamine was characterised by TLC, HNMR, IR and TGA. The efficiency and permanence of the bound diphenylamine was compared with conventional amine type antioxidant in natural
Natural rubber bound phenolic antioxidant and its application
The aim of this work was to prepare rubber-bound antioxidant from the reaction of natural rubber with a phenolic antioxidant, 2,6-di-tert-butyl-4-vinylphenol (DBVP). The properties of thermoplastic vulcanisate NR-DBVP/PP blend using phenolic vulcanization system and polypropylene modified phenolic resin (PhHRJ-PP) as
Studies on Natural Rubber Bound Para
Studies on Natural Rubber Bound Para-Phenylenediamine Antioxidants in NBR SHANTI A. AVIRAH and RANI JOSEPH' Department of Polymer Science and Rubber Technology, Cochin University of Science and Technology, Cochin 682 022, India SYNOPSIS Para-phenylenediamine (PD) was chemically attached to depolymerized natural rubber by a photochemical reaction.
Studies on the Aging Characteristics of Base Oil with Amine
An industrial base oil, a blend of different paraffin fractions, is heated to 130 °C (1) in the ambient and (2) for use as a lubricant in a steel pin on a steel disk sliding experiment. The base oil was tested with and without test antioxidants: dimethyl disulfide (DMDS) and alkylated diphenylamine (ADPA). Primary and secondary oxidation products were monitored continuously by FTIR over a 100
A highly efficient antioxidant based on boron and a Schiff
More importantly, the antioxidant capability of BSPD in vegetable oil is much better than that of commercial antioxidants [diphenylamine (DPA) and 2,6-di-tert-butyl-4-methylphenol (BHT)] and unmodified SPD. PMID: 31484816. Publication Types: Research Support, Non-U.S. Gov't; Grant support. 21606247/National Natural Science Foundation of China
Voltammetric Determination of Dinonyl Diphenylamine
Previous studies (Jun-bing, Aguilar, and Donnelly 2009; Rudnick 2009; Wu et al. 2013) have shown that the presence of natural or synthetic antioxidants in lubricants results in the enhancement of stability and extension of the lifetime of lubricants. However, the effectiveness of antioxidants decreases with operating time.
Antioxidants Classification and Applications in Lubricants
The typical group in this class of antioxidants are called alkylated diphenyl amines that are substituted amine antioxidants synthesized by the reaction between diphenylamine and alkylating agents. This group of antioxidants are used in lubricants as well as synthetic polymers and rubber vulcanizates .
CN102584601A - Preparation method of alkylated diphenylamine
The preparation method comprises the following steps of: proportionally adding an FS-2 catalyst, diphenylamine, a polymerization inhibitor and an organic solvent into a synthesis reaction kettle, wherein the ratio of the diphenylamine to alpha-vinyltoluene is 1:(2.1-2.5); the ratio of the diphenylamine to the FS-2 catalyst is 1:(0.1-0.18); the