Inherently flame-retardant flexible bio-based polyurethane sealant with phosphorus and nitrogen-containing polyurethane prepolymer

Ding, Haiyang; Xia, Changquan; Wang, Jifu; Wang, Chunpeng; Chu, Fuxiang

doi:10.1007/s10853-016-9805-y

Cited by 61 publications

(32 citation statements)

References 31 publications

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“…30,31 The PU-12EG-3HQ samples release similar pyrolysis products to the PU samples, but it was found that the amount of ammable gases released from PU-12EG-3HQ samples is much less than that from PU. The absorbance intensity of the main volatilized products for the PU and PU-12EG-3HQ samples is illustrated in Fig.…”

Section: Gas-phase Ame Retardancymentioning

confidence: 99%

Establishment of a highly efficient flame-retardant system for rigid polyurethane foams based on bi-phase flame-retardant actions

et al. 2018

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Rigid polyurethane foam (PU), one of the most promising wall insulation materials, exhibits high flammability and fire risk. In this work, PU/EG/HQ composites with highly effective flame retardancy were fabricated by adding two kinds of flame retardants, expandable graphite (EG) and 10-(2,5-dihydroxyphenyl)-10-hydro-9-oxa-10-phosphorylphenanthrene-10-oxide (DOPO-HQ), during the synthesis of polyurethane. Thermal stability and flammability were evaluated using the limiting oxygen index (LOI), thermogravimetric analysis (TGA), UL-94 vertical flame results, and cone colorimeter tests. The as-synthesized PU/EG/HQ composites showed a high LOI value, a maximum peak heat release rate (PHRR) value which was decreased by 58.5% and an increased char yield at 800 C. They also achieved UL-94 V-0 classification.SEM and Raman spectra indicated that the "worm-like" intumescent char layer with a graphitized structure and the formed viscous liquid film were vital factors in the enhancement of the flame retardancy of polyurethane foam in the condensed phase. TG-IR results show that the release of toxic volatiles and flammable gases from the PU/EG/HQ samples was remarkably decreased compared with the release from pure PU. This work associates a gas-solid biphase flame retardancy mechanism with the incorporation of two types of flame retardant and presents an effective method for the synthesis of bi-phase flame-retardant polymers.

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Section: Gas-phase Ame Retardancymentioning

confidence: 99%

Establishment of a highly efficient flame-retardant system for rigid polyurethane foams based on bi-phase flame-retardant actions

et al. 2018

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“…and . OH radicals in the flame region to suppress the flame . Morphology of resulting carbon residue after burning at 300 °C was observed by a digital camera and a laser confocal microscope (see Figure S8).…”

Section: Resultsmentioning

confidence: 99%

“…In addition, P-O component is also possibly produced in the burning, which can further combine with HC and COH radicals in the flame region to suppress the flame. [54,55] Morphology of resulting carbon residue after burning at 300 8C was observed by ad igital cameraa nd al aser confocal microscope (see Figure S8). Interestingly,c ontinuous porousc arbon layers are observed under microscopy.A ss hown in Figure 6(k), Figure S9 andT able 2, the T À5% ,T À10 % ,T À50 % and T max of the microcapsule printingp roducts after flame retardant treatment were 285.3 8C, 305.7 8C, 396.8 8Ca nd 692.6 8C, respectively,a nd the carbon residue was 13.3 %a t7 00 8C.…”

Section: Resultsmentioning

confidence: 99%

Surface‐Coated Thermally Expandable Microspheres with a Composite of Polydisperse Graphene Oxide Sheets

Jiao

Sun

Zhou

et al. 2019

Chemistry An Asian Journal

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Surface‐modified thermally expandable microcapsules (TEMs) hold potential for applications in various fields. In this work, we discussed the possible surface coating mechanism and reported the properties of TEMs coated with polyaniline (PANI) and polydisperse graphene oxide sheets (ionic liquid‐graphene oxide hybrid nanomaterial (ILs‐GO)). The surface coating of PANI/ ILs‐GO increased the corresponding particle size and its distribution range. The morphologies analyzed by scanning electron microscopy indicated that no interfacial gap was observed between the microspheres ink and substrate layer during the substrate application. The thermal properties were determined by thermogravimetric and differential thermal analyses. The addition of ILs‐GO to the polyaniline coating significantly improved the thermal expansion and thermal conductivity of the microcapsules. The evaporation of hexane present in the core of TEMs was not prevented by the coating of PANI/ ILs‐GO. The printing application of TEMs showed excellent adaptability to various flexible substrates with great 3D appearance. By incorporating a flame retardant agent into TEMs coated by PANI/ILs‐GO, finally, these TEMs also demonstrated a great flame retardant ability. We expect that these TEM‐coated PANI/ ILs‐GO are likely to have the potential to improve the functional properties for various applications.

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“…However, the intrinsic high flammability of RPUF restricts its use . With the increasing concern to the versatile environment‐friendly materials, it raises demand toward modified RPUF, such as improve their flame retardancy, mechanical properties, degradability, adhesion, compatibility, and insulation . In this paper, We focus on improving the flame retardancy and mechanical properties of RPUF with environment‐friendly additives.…”

Section: Introductionmentioning

confidence: 99%

Synergistic effect of carbon and phosphorus flame retardants in rigid polyurethane foams

Chen

Huang

et al. 2018

Fire and Materials

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Summary Two kinds of carbon and phosphorus synergistic system used to improve the flame retardancy of rigid polyurethane foams (RPUF) were studied. One is the synergistic effect of expandable graphite and guanidinium phosphate; the other is red phosphorus and guanidinium phosphate. The flame retardant properties and mechanical properties of these composites were investigated by limiting oxygen index, cone calorimeter test, as well as tension and compression test. These 2 groups of mixed inorganic flame retardants can greatly improve the flame retardancy of RPUF composites, as the limiting oxygen index increases from 20.1% to about 33% and the HRR reduces from 395 kW/m2 to below 200 kW/m2. It provides a convenient and inexpensive way to obtain RPUF with demanding properties.

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Inherently flame-retardant flexible bio-based polyurethane sealant with phosphorus and nitrogen-containing polyurethane prepolymer

Cited by 61 publications

References 31 publications

Establishment of a highly efficient flame-retardant system for rigid polyurethane foams based on bi-phase flame-retardant actions

Establishment of a highly efficient flame-retardant system for rigid polyurethane foams based on bi-phase flame-retardant actions

Surface‐Coated Thermally Expandable Microspheres with a Composite of Polydisperse Graphene Oxide Sheets

Synergistic effect of carbon and phosphorus flame retardants in rigid polyurethane foams

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