Synthesis and characterization of novel polyurethane crosslinked by linear oligo[bis‐(phenoxy)<sub>1.8</sub>(4‐hydroxybutaneoxy)<sub>0.2</sub> phosphazene]

Zhou, Yubo; Huang, Xiaobin; Huang, Yawen; Tang, Xiaozhen

doi:10.1002/app.30012

Cited by 9 publications

(2 citation statements)

References 27 publications

(18 reference statements)

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“…As a result, researches focused on improving the thermal stability of PUs have been attempted in various ways. One accepted approach for improving the thermal stability of PUs is the chemical modification of their structure by highly thermally stable heterocyclic groups 3–10…”

Section: Introductionmentioning

confidence: 99%

Poly(urethane‐co‐benzoxazine)s via reaction of phenol terminated urethane prepolymers and benzoxazine monomer and investigation of their properties

Jamshidi¹,

Yeganeh²,

Mehdipour‐Ataei³

2011

Polymers for Advanced Techs

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In the present work, a new method was developed for the combination of polyurethanes (PUs) and polybenzoxazine (PBz) to obtain novel thermoset poly(urethane-co-benzoxazine)s with good thermal, mechanical, and electrical properties as well as low temperature curing profile. Knowing the catalytic effect of compounds possessing free phenolic groups on ring opening polymerization of benzoxazine monomers, preparation of phenol terminated urethane oligomers (PTPU) as the macroinitiator for a benzoxazine monomer (Ba) was considered. Firstly, NCOterminated urethane prepolymers were prepared from the reaction of poly(tetramethyleneether glycol), and 2,4-tolylene diisocyanate, and then end functionalized with bisphenol-A under proper condition. DSC, DMTA, and gel content measurements were applied to find optimum ring opening polymerization condition (170-C for 1 hr and 200-C for 15 min). Various kinds of thermoset polymers were prepared by the reaction of PTPU at different molecular weights with variable contents of Ba. All of monomeric and polymeric materials were characterized by conventional spectroscopic methods and their thermal, mechanical, viscoelastic, and electrical properties were measured and properties were correlated to their structure. Due to the interesting properties of these new materials, the possibility of using them as electrical insulators with higher service temperature in comparison to common PUs were examined and their potential applicability was confirmed.

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Section: Introductionmentioning

confidence: 99%

Poly(urethane‐co‐benzoxazine)s via reaction of phenol terminated urethane prepolymers and benzoxazine monomer and investigation of their properties

Jamshidi¹,

Yeganeh²,

Mehdipour‐Ataei³

2011

Polymers for Advanced Techs

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“…A major challenge in polyurethane science and technology is to broaden the application window by retaining the above features, whilst enhancing characteristics such as fire performance and heat resistance 3, 4. One widely explored route to achieve this is to modify polyurethanes with thermally stable heterocyclic groups such as oxazolidone, isocyanurate, imide, triazine, phosphazene and azomethine 5–10. Blending with thermally stable polymers is another area of extensive research for improving the thermal performance of polyurethanes 11, 12…”

Section: Introductionmentioning

confidence: 99%

Thermally curable polyurethanes containing naphthoxazine groups in the main chain

Yeganeh

Jangi

2010

Polymer International

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A new methodology has been developed for the modification of polyurethanes with reactive naphthoxazine moieties in order to expand their industrial applicability as electrical insulators. Thermoplastic and organosoluble poly(urethane‐co‐naphthoxazine)s were prepared by the reaction of NCO‐terminated urethane prepolymers made from various soft segments with a naphthoxazine‐containing diol chain extender. The prepared polymers were easily processed into thin films using either solution casting or compression moulding techniques. Heat treatment of these films under optimized conditions (200 °C for 30 min) led to the thermally activated ring‐opening polymerization of naphthoxazine moieties, and consequently crosslinked networks were obtained. All of the starting materials and the final polymeric compounds were fully characterized using spectroscopic methods and their physical and chemical properties evaluated and then correlated with their chemical structures. Due to their good elongation property (up to 70% elongation at break) in comparison to polynaphthoxazines, significant enhancement in decomposition temperature as well as high value of dielectric breakdown strength (up to 30 kV mm−1) in comparison to polyurethanes, these materials are potentially applicable as electrical insulators with service temperatures higher than those for related unmodified polyurethanes. Copyright © 2010 Society of Chemical Industry

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Polyphosphazene Polymer

Ogueri

Allcock

Laurencin

2019

Encyclopedia of Polymer Science and Technology

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Polyphosphazenes are a unique class of inorganic–organic hybrid polymers with a backbone composed of alternating phosphorus and nitrogen atoms. The ease with which the precursor prepolymer poly(dichlorophosphazene) can be modified has resulted in a versatile polymer system. The labile nature of the P−Cl bonds has allowed the substitution of chlorine atoms with groups like alkoxy‐, aryloxy, alkyl ether, fluoroalkoxy, amino acid/peptide esters, drug molecules, transition metal groups, and many more. Careful selection of the side groups offers efficient control of material properties such as bioactivity, crystallinity, solubility, and surface characteristics. Hence, these properties have led to the use of this exceptional class of polymers in a broad range of applications such as biomaterials for regenerative engineering and drug delivery, elastomers, solid membranes for gas/liquid separation, optical materials, flame retardants, and electrolytes for energy storage cells. This article gives an overview of the synthetic routes of polyphosphazene polymers and their composition–structure–properties relationships and highlights their applications in various fields.

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Synthesis and characterization of novel polyurethane crosslinked by linear oligo[bis‐(phenoxy)_1.8(4‐hydroxybutaneoxy)_0.2 phosphazene]

Cited by 9 publications

References 27 publications

Poly(urethane‐co‐benzoxazine)s via reaction of phenol terminated urethane prepolymers and benzoxazine monomer and investigation of their properties

Poly(urethane‐co‐benzoxazine)s via reaction of phenol terminated urethane prepolymers and benzoxazine monomer and investigation of their properties

Thermally curable polyurethanes containing naphthoxazine groups in the main chain

Polyphosphazene Polymer

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Synthesis and characterization of novel polyurethane crosslinked by linear oligo[bis‐(phenoxy)1.8(4‐hydroxybutaneoxy)0.2 phosphazene]

Cited by 9 publications

References 27 publications

Poly(urethane‐co‐benzoxazine)s via reaction of phenol terminated urethane prepolymers and benzoxazine monomer and investigation of their properties

Poly(urethane‐co‐benzoxazine)s via reaction of phenol terminated urethane prepolymers and benzoxazine monomer and investigation of their properties

Thermally curable polyurethanes containing naphthoxazine groups in the main chain

Polyphosphazene Polymer

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Product

Resources

About

Synthesis and characterization of novel polyurethane crosslinked by linear oligo[bis‐(phenoxy)_1.8(4‐hydroxybutaneoxy)_0.2 phosphazene]