Flame retardant composition, fiber, preparation method and application thereof
A technology of flame retardant composition and flame retardant fiber, which is applied in the use of flame retardant fiber in various applications, and in the field of preparation of continuous flame retardant fiber, which can solve problems such as poor melt stability
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[0078] Preparation of dichlorophosphazene elastomer: thermal ring-opening polymerization of hexachlorophosphazene trimer in an oven at 250°C, as described in Am.Chem.Soc.1965,87,4216 by Allcock, H.R. et al. reports.
[0079] Preparation of nucleophilic substituted PPZ: Take dichloropolyphosphazene into a THF-containing three-necked flask, and add trifluoroethanol, octafluoropentanol, and sodium allylphenol dropwise to it through a dropping funnel under an inert atmosphere. salt and stir for about 24 hours. The resulting mass was poured into water to collect the elastomer and then dried in a vacuum oven.
[0080] Mixture of matrix and additive: 88% to 97% (w / w) matrix and 3% to 12% (w / w) additive, wherein each of said matrix and additive is independently selected from ultra-high molecular weight Polyethylene (UHMPE) and polyphosphazene (PPZ); and wherein, when the matrix is UHMPE, the additive is PPZ, and when the matrix is PPZ, the additive is UHMPE. A UHMPE / PPZ matrix ...
Embodiment 1
[0088] Dichloropolyphosphazene elastomer (20.0 g, 0.055 mol) as prepared by the reported method was taken into a three-necked flask (3.0 L) containing dry THF (400 ml). The sodium salts of trifluoroethanol (26.4 g, 0.264 mol), octafluoropentanol (11.49 g, 0.0495 mol), allylphenol (2.21 g, 0.0165 mol) were prepared separately in dry THF under an inert atmosphere. Under an inert atmosphere, the prepared sodium salt of fluoroalcohol and allylphenol was alternately added dropwise into the polymer solution through a dropping funnel and stirred continuously for 24 hours. After the reaction was complete, the entire mass was poured into water to provide the substituted PPZ. The PPZ thus provided was dried in a vacuum oven at 100°C, 6-7 mm Hg, for 4 hours.
[0089] The prepared PPZ was mixed with UHMPE at a UHMPE / PPZ ratio of 97 / 3 (w / w) by solution mixing in decalin and THF as cosolvents for UHMPE and PPZ, respectively, followed by cryogrinding and mixing in Films were cast using com...
Embodiment 2
[0091] Dichloropolyphosphazene elastomer (20.0 g, 0.055 mol) as prepared by the reported method was taken into a three-necked flask (3.0 L) containing dry THF (400 ml). The sodium salts of trifluoroethanol (26.4 g, 0.264 mol), octafluoropentanol (11.49 g, 0.0495 mol), allylphenol (2.21 g, 0.0165 mol) were prepared separately in dry THF under an inert atmosphere. Under an inert atmosphere, the prepared sodium salt of fluoroalcohol and allylphenol was alternately added dropwise into the polymer solution through a dropping funnel and stirred continuously for 24 hours. After the reaction was complete, the entire mass was poured into water to provide the substituted PPZ. The PPZ thus provided was dried in a vacuum oven at 100°C, 6-7 mm Hg, for 4 hours.
[0092] The prepared PPZ was mixed with UHMPE at a UHMPE / PPZ ratio of 88 / 12 (w / w) by solution mixing in decalin and THF as cosolvents for UHMPE and PPZ, respectively, followed by cryogrinding and mixing in Films were cast using co...
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