Synthesis and polymerization of multifunctional cyclophosphazenes

Full text of DOI:10.1080/10426500490429095

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Phosphorus, Sulfur, and Silicon and the Related
Elements
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SYNTHESIS AND POLYMERIZATION OF MULTIFUNCTIONAL
CYCLOPHOSPHAZENES
Lianhui Cong a & Christopher W. Allen a
a University of Vermont, Burlington , Vermont, USA
Published online: 12 Aug 2010.
To cite this article: Lianhui Cong & Christopher W. Allen (2004) SYNTHESIS AND POLYMERIZATION OF MULTIFUNCTIONAL
CYCLOPHOSPHAZENES, Phosphorus, Sulfur, and Silicon and the Related Elements, 179:4-5, 961-963, DOI:
10.1080/10426500490429095
To link to this article: http://dx.doi.org/10.1080/10426500490429095
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Phosphorus, Sulfur, and Silicon, 179:961–963, 2004
ꢀC
Copyright Taylor & Francis Inc.
ISSN: 1042-6507 print / 1563-5325 online
DOI: 10.1080/10426500490429095
SYNTHESIS AND POLYMERIZATION OF
MULTIFUNCTIONAL CYCLOPHOSPHAZENES
Lianhui Cong and Christopher W. Allen
University of Vermont, Burlington, Vermont, USA
(Received September 16, 2003; accepted October 1, 2003)
Keywords: Cross linked polymers; cyclophosphazenes; TGA
It has been found that the variety of new and useful cyclotriphosp-
hazene derivatives that are available by nucleophilic displacement
of halogens on the phosphazene ring can be expanded dramati-
cally by incorporation of the organofunctional substituents on the
phosphazene ring. In our lab, several cyclotriphosphazene deriva-
tives with multiple exocyclic, unsaturated groups were synthesi-
zed: N3P3(OC6H4CH CH2)6(1), N3P3(O(CH2)4OC(O)C(CH3) CH2)6(2),
N3P3(OCH2C(CH3)(CH2OC(O)C(CH3) CH2)CH2O)3 (3). (Scheme 1).
The polymerization and thermal stability of the copolymers of the
SCHEME 1 (Continued)
Address correspondence to Christopher W. Allen, Department of Chemistry, Uni-
versity of Vermont, Cook Physical Science Building, Burlington, VT 05405. E-mail:
Christopher.Allen@uvm.edu
961

962
L. Cong and C. W. Allen
SCHEME 1 (Continued)
FIGURE 1 (a) TGA of copolymers of cyclotriphosphazene 1 and styrene;
(b) TGA of copolymers of cyclophosphazene 2 and MMA; and (c) TGA of copoly-
mers of cyclophosphazene and MMA.

Synthesis of Polymerization
963
multifunctional cyclotriphosphazenes and styrene or methyl methacry-
late were investigated. TGA analysis showed the thermal stability of
copolymer was greatly enhanced compared with polystyrene and poly-
methyl methacrylate (Figure 1).
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