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- W2100032277 abstract "Polydichlorophosphazene [NPCl2]n reacts with the diphenol 2,2′-(HO)C6H4-C6H4(OH) in THF in the presence of K2CO3 to give the polymers [NP(O2C12H8) · x(OC4H8)]n (1) that contain variable ammouts of polytetrahydrofuran (PTHF) with x ranging from 0.05 to 0.8. This PTHF content (x) depends on the method followed to prepare the THF solutions of [NPCl2]n used for the reactions with the biphenol and can be made negligibly small, forming these solutions in the presence of K2CO3. This reveals the presence in the [NPCl2]n of acidic species capable of catalyzing the ring opening polymerization of THF. Polyphosphazene [NP(O2C12H8)]n (2) was prepared completely free of PTHF using dioxane as solvent. A comparison of the thermal behavior and morphological data of the polymers 1, 2, PTHF (5), and mixtures of [NP(O2C12H8)]n + x(OC4H8)m (4) revealed that the products 1 are strongly interacting polymer blends and ruled out the possibility of block copolymers. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 77: 568–576, 2000" @default.
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- W2100032277 date "2000-07-18" @default.
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- W2100032277 title "On the presence of polytetrahydrofuran in the polyspiro-phosphazenes [NP(O2C12H8)]n prepared from [NPCl2]n and 2,2?-dihydroxybiphenyl in THF as solvent" @default.
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- W2100032277 doi "https://doi.org/10.1002/(sici)1097-4628(20000718)77:3<568::aid-app12>3.0.co;2-1" @default.
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