Preparation and characterization of waterborne polyurethane/attapulgite nanocomposites

Hong-xia, Pan; Chen, Dajun

doi:10.1016/j.eurpolymj.2007.06.031

Cited by 82 publications

(49 citation statements)

References 28 publications

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“…A fibrillar single crystal is the structural unit, with 20-30 nm in diameter and 0.5-2.0 µm in length [14][15][16]. Owing to the low price, relatively high surface area, good mechanical strength and thermal stability, AT is attracting more and more attention in the preparation of polymer/clay composites [17][18][19][20]. The preparation of PET/AT has been also explored, and a silylation modification of AT was carried out via the reaction of silane coupling agents with the silanol groups on AT surface [21,22].…”

mentioning

confidence: 99%

Rod like attapulgite/poly(ethylene terephthalate) nanocomposites with chemical bonding between the polymer chain and the filler

Chen¹,

Liu²,

Jin³

et al. 2012

Express Polym. Lett.

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IntroductionPoly(ethylene terephthalate) (PET) is a semicrystalline polymer with excellent chemical resistance, thermal stability, and spinnability. Due to its low cost and high performance, PET is in widespread use in our modern life, ranging from textile fibers, films, bottles containers and food packaging materials to engineering plastics, etc. However, numerous shortcomings such as low rate of crystallization, long cycle times for injection moulding, low melt strength and low distortion temperature limit its application [1,2]. To meet the practical needs and improve its performance, the addition of inorganic filler into PET matrix has been a research focus, and dramatic enhancements in properties such as their mechanical, gas barrier property and thermal property can be achieved [3][4][5][6][7][8][9][10][11][12][13]. These enhancements result from homogeneous dispersion of nanoparticles in polymer matrix and the interaction between the nanoparticles and PET matrix. The in situ polymerization technique is particularly attractive, which enables to exercise control over both the polymer architecture and the final structure of the composites. Recently various nanoparticles have been applied in the preparation of PET nanohybrids via in situ polymerization or melt mixing, including layered silicates montmorillonite (MMT) [3][4][5][6], spherical silica [7,8] Abstract. Poly(ethylene terephthalate) (PET) nanocomposites containing rod-like silicate attapulgite (AT) were prepared via in situ polymerization. It is presented that PET chains identical to the matrix have been successfully grafted onto simple organically pre-modified AT nanorods (MAT) surface during the in situ polymerization process. The covalent bonding at the interface was confirmed by Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The content of grafted PET polymer on the surface of MAT was about 26 wt%. This high grafting density greatly improved the dispersion of fillers, interfacial adhesion as well as the significant confinement of the segmental motion of PET, as compared to the nanocomposites of PET/pristine AT (PET/AT). Owing to the unique interfacial structure in PET/MAT composites, their thermal and mechanical properties have been greatly improved. Compared with neat PET, the elastic modulus and the yield strength of PET/MAT were significantly improved by about 39.5 and 36.8%, respectively, by incorporating only 2 wt % MAT. Our work provides a novel route to fabricate advanced PET nanocomposites using rod-like attapulgite as fillers, which has great potential for industrial applications.

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confidence: 99%

Rod like attapulgite/poly(ethylene terephthalate) nanocomposites with chemical bonding between the polymer chain and the filler

Chen¹,

Liu²,

Jin³

et al. 2012

Express Polym. Lett.

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“…Attapulgite has been also used as nanofiller to improve properties of several polymers, such as polyuretane 9 , polypropylene 10 and polyamide 6 11 . The aim of this work was to prepare and characterize PHBV/ organophilic attapulgite (MAT) nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Morphology and thermal properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/attapulgite nanocomposites

2011

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Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) -PHBV is a biodegradable polyester which has been studied as an option for the production of disposable goods. Attapulgite is a fibrous clay mineral. The aim of this work was to produce and characterize renewable resource derived-nanocomposites based on PHBV and organophilic attapulgite (MAT). The nanocomposites were characterized by XRD, SEM and thermal analysis. It was observed reduction in degree of crystallinity, in melting and glass transition temperatures and in thermal stability of polymer due to the addition of clay to PHBV matrix. The best results were obtained for PHBV films containing 3 and 5% MAT. These films presented a slight increase in processing window and decrease in crystalline temperature and in degree of crystallinity as compared to pure PHBV.

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“…[1][2][3] However, with more severe regulations of volatile organic compounds (VOC) release, attentions in waterborne polyurethanes (WPU) materials have been received because of their applications in a variety of foams, coatings, and adhesives. [4][5][6][7][8] During the synthesis of WPU, water as a dispersant replaced the organic solvent, largely reducing the release of VOC. But due to the introduction of hydrophilic groups in the polyurethane chains, the water-resistance property of WPU is usually inferior to solvent-based polyurethanes and their applications were greatly restricted.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of α,ω-vinyl telechelic polyurethane macromonomer and preparation of polyurethane-poly(methyl methacrylate) copolymer emulsions via RAFT emulsion polymerization)

Wang

Zong

2015

Designed Monomers and Polymers

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In this study, α,ω-vinyl telechelic polyurethane macromonomers used as macromonomer and stabilizer of emulsion system were synthesized by reaction of poly(propylene glycol), 4,4-diphenylmethane diisocyanate (MDI), 2,2-dimethylolbutanoic acid (DMBA), diethylene glycol, and 2-hydroxyethyl acrylate (HEA). Different compositions of methyl methacrylate (MMA) and α,ω-vinyl telechelic polyurethane macromonomers were successfully carried out reversible addition-fragmentation chain transfer radical polymerization (RAFT) mediated by RAFT agent, 2-(dodecylthiocarbonothioylthio) propanoic acid. It was demonstrated that the waterborne polyurethane (WPU)-poly(methyl methacrylate) copolymer emulsions prepared by RAFT emulsion copolymerization exhibited enhanced storage stability. No precipitation was observed for longer than six months during the storage at ambient temperature for all the copolymer emulsions. With increase in addition amount of MMA, the electrolyte stability became worse. The water-resistance property and mechanical property of the WPU/poly(methyl methacrylate) copolymer films were improved obviously.

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Preparation and characterization of waterborne polyurethane/attapulgite nanocomposites

Cited by 82 publications

References 28 publications

Rod like attapulgite/poly(ethylene terephthalate) nanocomposites with chemical bonding between the polymer chain and the filler

Rod like attapulgite/poly(ethylene terephthalate) nanocomposites with chemical bonding between the polymer chain and the filler

Morphology and thermal properties of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)/attapulgite nanocomposites

Synthesis of α,ω-vinyl telechelic polyurethane macromonomer and preparation of polyurethane-poly(methyl methacrylate) copolymer emulsions via RAFT emulsion polymerization)

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