Structural-orientational processes in the capillary flow of a melt of polyethylene-poly-bis-trifluoroethoxyphosphazene blends

Borisenkova, Ye.K.; Tur, D. R.; Литвинов, И. А.; Antipov, Ye.M.; Куличихин, В. Г.; Platè, N.A.

doi:10.1016/0032-3950(90)90113-k

Cited by 4 publications

(4 citation statements)

References 7 publications

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“…The addition of 10% PFEPh to PE brings about a 3.5 times decrease in viscosity. At r ~ 1.5 x 10 5 Pa, we can observe a viscosity anomaly appearance, which is already typical for 100% PFEPh [54]. The viscosity anomaly effect is more pronounced for a blend with 30% PFEPh.…”

Section: Polymer Blends On a Base Of Poly-bistrifluoroethoxyphosphazenementioning

confidence: 61%

Mesophase State of Polyorganophosphazenes

Kulichikhin¹,

Антипов²,

Borisenkova³

et al. 1994

Partially Ordered Systems

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Earlier it was believed [1] that an ordering at a level exceeding the shortrange order of low molecular liquids cannot exist above the melting point in flexible-chain polymers which do not contain meso genic groups. However, recently, a large number of polymers, for example, polyphosphazene, has been found, which cannot be described in the framework of the traditional classification of liquid crystals. An additional type of mesomorphic state, that of a conformationally disordered crystal, was suggested [2,3].A more common approach is analyzing this type of mesophase as a threedimensional ordered crystal having a different perfection extent along each of its crystallographic dimensions. In order to gain a better insight into this problem, it is necessary to accumulate experimental evidence.Polyorganophosphazenes (PPh) with the following general formula:are of interest from the viewpoint of the meso phase class of polymers [4], since many of the representatives of this class may have an ordering level intermediate between a crystalline and an amorphous state in a broad temperature range [5]. A comprehensive review of earlier works on the structure and properties of PPh was published in [6]. The number of publications on the description of the structure, morphology, and characteristics of the physical transitions and physical-mechanical properties of these polymers has considerably increased in recent years. However, there is no complete information on the structure of PPh, especially in the mesomorphous state. V. P. Shibaev et al. (eds.), Liquid Crystalline and Mesomorphic Polymers

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Section: Polymer Blends On a Base Of Poly-bistrifluoroethoxyphosphazenementioning

confidence: 61%

Mesophase State of Polyorganophosphazenes

Kulichikhin¹,

Антипов²,

Borisenkova³

et al. 1994

Partially Ordered Systems

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“…265 ± 267 There are data on using poly(organophosphazenes) as elastic hermetic adhesives for inert materials 164 and for impregnation of textiles in order to impart water-and soil-repelling properties to them. 272 Being used to modify other polymers, polyethylene and ABS plastics, 13,241,242 polyvinylphenylsiloxane rubber, 270,271 polyesters, phenolic and epoxide polymers, 10,24 etc., poly(organophosphazenes) improve in some cases technological properties, elasticity, flame resistance, and thermal stability of these materials.…”

Section: Discussionmentioning

confidence: 99%

“…Polyphosphazenes added in small amounts sharply decrease the viscosity of polyethylene during extrusion and permit production of extrudates with good surface quality. 241 A decrease in the melt viscosity by approximately 40% was observed for mixtures of the ABS plastics with 10% of poly[bis(trifluoroethoxy)phosphazene]. The increase in the elasticity of samples, formed from these mixtures, at 225 ± 240 8C (processing temperatures) is presumably due to the orientation effect induced by the mesomorphic character of polyphosphazene in this temperature range.…”

Section: Physical Propertiesmentioning

confidence: 90%

“…235 The physical state of poly(organophosphazenes) has a considerable influence on the properties of composite materials based on these polymers. Blends of poly[bis(trifluoroethoxy)phosphazene] with polyethylene 13,241,242 and with the ABS plastic (a ternary copolymer of acrylonitrile, butadiene, and styrene) have been studied. 215 It was found that the unusual rheological properties of isotropic and mesomorphic polyphosphazenes can be used to modify the technological properties of ultra-high-molecularmass polyethylenes.…”

Section: Physical Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Open-chain poly(organophosphazenes). Synthesis and properties

Виноградова¹,

Tur²,

Васнев³

1998

Russ. Chem. Rev.

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Mesophase structure of some flexible chain polymers

Антипов

Куличихин

Platè

1992

Polymer Engineering & Sci

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The mesophase structures of some flexible chain polymers, which do not contain mesogenic groups, but are able to form thermodynamically equilibrium mescmorphic states, were studied by means of the X-ray analysis, the differential scanning calorimetry, and other methods. The mesophase polyethylene in bicomponent polymer blends, mesomorphic ultra-high molecular weight polyphosp hazenes, and membrane polyvinylorganosilanes were investigated. The scheme of polymer phase transitions is discussed. Besides conformational disordering, the step-by-step loss of different levels of the positional order (i.e. the multiple-step character of melting) of flexible, semiflexible, and stiff chain polymers is deduced and illustrated by examples from the authors' experience and from the literature.

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Structural-orientational processes in the capillary flow of a melt of polyethylene-poly-bis-trifluoroethoxyphosphazene blends

Cited by 4 publications

References 7 publications

Mesophase State of Polyorganophosphazenes

Mesophase State of Polyorganophosphazenes

Open-chain poly(organophosphazenes). Synthesis and properties

Mesophase structure of some flexible chain polymers

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