Crosslinking of nitrile rubber (NBR) and poly(vinyl chloride) (PVC) can be accomplished separately using ethylenethiourea (ETU) with and without the presence of sulphur (S) respectively. ETU/S combination in appropriate doses brings about ready co-crosslinking of NBR and PVC in their blends. Comparative studies of the curing characteristics of some NBR-PVC blends and some important physical properties of the blend vulcanizates have been made using the test curative (ETU/S system) and a conventional curative (tetramethylthiuram disulphide (TMTD)/sulphur (S) system). The ETU/S curative system produces crosslinking effects which in some respects are comparable with, and in some other respects are even substantially better than, those produced by the conventional TMTD/S curative system, particularly with respect to consequential curing parameters and blend vulcanizate properties including morphological patterns and ageing behaviour. © 1992.

P GHOSH

A K SEN

P RAY

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Crosslinking in blends of nitrile rubbers and poly(vinyl chloride)

Polymer

Kinetics of dehydrochlorination of poly(vinyl chloride) (PVC), induced by a weak base such as ammonium hydroxide or n-butylamine (n.BA) in cyclohexanone solution, were studied by following the disappearance of NH4OH or n.BA on reacting with the HCl liberated. An overall kinetic scheme was considered and the rate constants of dehydrochlorination under various sets of conditions determined. The initial rate constants (k1) of dehydrochlorination at 40°C induced by NH4OH or n.BA are very close (3.10 × 10-3 l mol-1 min-1) indicating that NH4OH and n.BA are comparable in their capacity to induce dehydrochlorination of PVC in solution. © 1987.

European Polymer Journal

Studies on the kinetics of dehydrochlorination of poly(vinyl chloride) in solution induced by a weak base

Macromolecular Chemistry and Physics

Macromol. Chem. Phys. 12/2008

The Wiley Database of Polymer Properties

KOBUNSHI RONBUNSHU

10.1295/koron.36.27

Journal of Polymer Science: Polymer Chemistry Edition

Modification of poly(vinyl chloride). XXXI. Crosslinking of poly(vinyl chloride) with 2-R-4,6-dithiol-s-triazine and metal activators

Journal	Polymer
Publisher	-
ISSN	0032-3861