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Stannic Chloride-Para Toluene Sulfonic Acid as a Novel Catalyst-Co-Catalyst System for the Designing of Hydroxyl Terminated Polyepichlorohydrin Polymer: Synthesis and Characterization

Stannic Chloride-Para Toluene Sulfonic Acid as a Novel Catalyst-Co-Catalyst System for the Designing of Hydroxyl Terminated Polyepichlorohydrin Polymer: Synthesis and Characterization

Muhammad Ahmad, Muhammad Sirajuddin, Zareen Akther, Waqar Ahmad

Spectrochim Acta A Mol Biomol Spectrosc. 2015 Dec 5;151:164-73.

PMID: 26135537

Abstract:

Hydroxy terminated polyepichlorohydrin (PECH) was synthesized in good yield (85-88%) with improved functionality (2.01-2.53) and desired number average molecular weight (∼3000), using a novel catalyst-co-catalyst combination. The effect of various molar ratios (4-12) of p-toluenesulphonic acid and SnCl4 on molecular weight of PECH was investigated. Different polymerization conditions like temperature, time and monomer addition rates were found to have pronounced effect on molecular weight, polydispersity and functionality of the products. The molecular weight distribution and polydispersity of the synthesized polymers were determined by Gel permeation chromatography (GPC). Absolute value of Number average molecular weight (Mn) was established with vapor pressure osmometry and structural elucidations were carried out by FT-IR and NMR spectroscopic techniques. Terminal Hydroxyl groups were quantified by acetylation method and functionality was derived from hydroxyl value and Mn.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP24969060	Polyepichlorohydrin		24969-06-0	Price

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