首页> 外文期刊>Journal of Applied Polymer Science >On the presence of polytetrahydrofuran in the polyspirophosphazenes [NP(O2C12H8)](n) prepared from [NPCl2](n) and 2,2 '-dihydroxybiphenyl in THF as solvent
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On the presence of polytetrahydrofuran in the polyspirophosphazenes [NP(O2C12H8)](n) prepared from [NPCl2](n) and 2,2 '-dihydroxybiphenyl in THF as solvent

机译:在由[NPCl2](n)和2,2'-二羟基联苯在THF中作为溶剂制备的聚螺磷腈中存在[NP(O2C12H8)](n)

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摘要

Polydichlorophosphazene [NPCI2](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 intecracting polymer blends and ruled out the possibility of block copolymers. (C) 2000 John Wiley & Sons, Inc. [References: 31]
机译:在K 2 CO 3的存在下,聚二氯磷腈[NPCI2](n)与二酚2,2-(HO)C6H4-C6H4(OH)在THF中反应,得到聚合物[NP(O2C12H8)。 x(OC4H8)](n)(1)包含变化的聚四氢呋喃(PTHF)氨纶,x的范围为0.05到0.8。该PTHF含量(x)取决于制备用于与双酚反应的[NPCl2](n)的THF溶液所遵循的方法,并且可以将其制备得很小,在K2CO3存在下形成这些溶液。这表明在[NPCl2](n)中存在能够催化THF开环聚合的酸性物质。使用二恶烷作为溶剂,制备完全不含PTHF的聚磷腈[NP(O2C12H8)](n)(2)。聚合物1、2,PTHF(5)和[NP(O2C12H8)](n)+ x(OC4H8)(m)(4)的混合物的热行为和形态学数据的比较表明,产物1为强烈引入聚合物共混物,并排除了嵌段共聚物的可能性。 (C)2000 John Wiley&Sons,Inc. [参考:31]

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