1993
DOI: 10.1002/pola.1993.080311328
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Melt polymerization of hexachlorocyclotriphosphazene in the presence of organotin (IV) compounds

Abstract: The melt polymerization of hexachlorocyclotriphosphazene to poly(dichlorophosphazene) has been studied in the presence of organotin (IV) compounds. Unlike other typical Lewis acids, diethyltin (IV) chloride, Et2SnCl2, has shown to be an inhibitor for the thermal polymerization of the trimer, raising the activation energy to 70 kcal/mol. Diethyltin(IV) chloride remarkably delayed the rate of polymerization and efficiently inhibited the crosslinking reaction, thus leading to an improvement in the yield of the li… Show more

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Cited by 4 publications
(2 citation statements)
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“…The yield of reaction was not so good and was normally between 40-60%, which compelled the researchers to use different catalysts, such as AlCl 3 , BCl 3 , and R 3 Si(CHB 11 X 11 ), to enhance the yield. [22][23][24][25][26] Scheme 1 provides general mechanism that is followed in thermal ring-opening polymerization. 27 This process of ring opening can proceed either in vacuum 28 or in high-boiling solvents.…”
Section: Thermal Ring-opening Polymerizationmentioning
confidence: 99%
“…The yield of reaction was not so good and was normally between 40-60%, which compelled the researchers to use different catalysts, such as AlCl 3 , BCl 3 , and R 3 Si(CHB 11 X 11 ), to enhance the yield. [22][23][24][25][26] Scheme 1 provides general mechanism that is followed in thermal ring-opening polymerization. 27 This process of ring opening can proceed either in vacuum 28 or in high-boiling solvents.…”
Section: Thermal Ring-opening Polymerizationmentioning
confidence: 99%
“…obtain non-cross-linked polymers at ambient temperature to improve the yield but purification of the polymer product was another problem. HCCP monomer should be highly pure because in the presence of small amounts of impurity or moisture, monomers were converted into cross-linked polymer [17][18][19][20][21][22]. Nowadays there are many synthetic routes for preparation of polyphosphazenes that require elevated temperatures.…”
Section: Thermal Ring-opening Polymerizationmentioning
confidence: 99%