Amphiphilic polyphosphazenes as membrane materials: influence of side group on radiation cross-linking

Allcock, Harry R.; Gebura, M.; Kwon, Suk-Ky; Neenan, Thomas X.

doi:10.1016/0142-9612(88)90045-2

Cited by 40 publications

(30 citation statements)

References 31 publications

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“…A series of studies carried out in my group by Kwon, Gebura, Riding, Fitzpatrick, and Bennett (41)(42)(43)(44)51). revealed that MEEP is sensitive to crosslinking when exposed to gamma rays.…”

Section: Solid Polymeric Electrolytes Based On Crosslinked Meep-type mentioning

confidence: 99%

Macromolecular and Materials Design Using Polyphosphazenes

Allcock

1994

ACS Symposium Series

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A 279 781 .ENTAT0704N0188I ~ ~ut qf q~c fl~ D~Cu~m q tle IMO tOE r.. nq -flhtfli cisoet s Saeeci nq *%.Sungq eatsa vn LA7 a ma *qtte tro COII."IIOA ou tnst iO .ree, iM W aralq but* oM tm ate OC 4ft Ottwsl a 0oe l o s tp4.% ou'et onto vv41n*qton meoooo-Aat-r $4"voee, otrectorate for infformatiOqN O{4WI49M•AeI, •t$ 1&04 "00"sl~r "te cfficeIt mf anaqqm" t aa s get. 0 -100twOtt Retf tn Pr la`tt (0 ?04. Reproduction in whole or in part is permitted for any purpose of the United States Government. This document has been approved for public release; distribution is unlimited. ABSTRACT (Maximum 200 words)Polyphosphazenes are among the most versatile of all polymers. This is a consequence of the unique properties of the phosphorus-nitrogen backbone and the ease with which a wide range of different side groups can be introduced mainly by macromolecular substitution, but also by the polymerization of different "monomers". This field has reached a stage where the fundamental chemistry now allows the design and synthesis of a broad range of new materials that are valuable for properties such as elasticity, high refractive index, liquid crystallinity, ferroelectric-, NLO-, and photochromic attributes, and for uses as solid ionic conductors, biomedical microencapsulation polymers, and materials with controlled surface properties. Polyphosphazenes are among the most versatile of all polymers. This is a consequence of the unique properties of the phosphorus-nitrogen backbone and the ease with which a wide range of different side groups can be introduced mainly by macromolecular substitution, but also by the polymerization of different "monomers". This field has reached a stage where the fundamental chemistry now allows the design and synthesis of a broad range of new materials that are valuable for properties such as elasticity, high refractive index, liquid crystallinity, ferroelectric-, NLO-, and photochromic attributes, and for uses as solid ionic conductors, biomedical microencapsulation polymers, and materials with controlled surface properties. Inorganic-Organic Polymers as Components of New MaterialsMaterials science covers a very broad range of substances within the four main classical categories of ceramics, metals, semiconductors/electro-optical solids, and petrochemical polymers.Most of the examples in the first three categories are inorganic ip composition, while the last is mainly organic.All four have advantages and disadvanges. For example, the totally inorganic materials are heavy, often britttle, and difficult to fabricate. On the other hand, conventional polymers are tough and easy to fabricate but are unstable at elevated temperatures and lack many of the interesting electrical and optical properties of the inorganic materials.The main concept behind the current interest in inorganic or inorganic-organic polymers is that they may provide a means for the preparation of new materials that combine the advantages and minimize the disadvantages of the classical materials. Thus, the long term interest lies in the d...

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Section: Solid Polymeric Electrolytes Based On Crosslinked Meep-type mentioning

confidence: 99%

Macromolecular and Materials Design Using Polyphosphazenes

Allcock

1994

ACS Symposium Series

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“…16 The mechanism of this process is illustrated in Scheme V. Cross-linking is believed to occur by radiation-induced, carbon-hydrogen bond cleavage, followed by cross-combination of the NHCH2. radicals produce•.…”

Section: Poly(bis(merhylamino)phosphazene) (4)mentioning

confidence: 99%

“…radicals produce•. This cross-linldng process has been used to stabilize 5 membranes prepared from polyphosphanes that contin bock methylamio and fluoroalkoxy or aryloxy conttubxent gCOP 16 …”

Section: Poly(bis(merhylamino)phosphazene) (4)mentioning

confidence: 99%

Water-Soluble Polyphosphazenes and Their Hydrogels

Allcock¹

1994

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“…Poly(phosphazenes) are a novel class of high molecular weight polymers consisting of a long chain backbone of alternating phosphorus and nitrogen atoms, with two side groups attached to each phosphorus (Allcock et al, 1988). Most of the poly(phosphazenes) synthesized are hydrolytically stable.…”

Section: Polyphosphazenesmentioning

confidence: 99%