Production of highly disperse powder materials based on thermoplastics and thermoplastic blends by elastic-deformation grinding

Yenikolopyan, N.S.; Akopyan, Ye.L; Karmilov, A. Yu.; Никольский, В.Г.; Khachatryan, A. M.

doi:10.1016/0032-3950(88)90029-9

Cited by 10 publications

(3 citation statements)

References 2 publications

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“…It is evident that the size of microcrystals and the crystallinity of PA6 decreased during pulverization. This is consistent with earlier reported results 13…”

Section: Resultssupporting

confidence: 94%

“…The ternary copolymerized polyamide used by them has lower crystallization and melting point than regular nylon. Numerous papers have reported on structural, morphological, and other properties that could be developed via a solid‐state mechanochemical method 8–13. Liu and Wang14 reported on the crystallinity and size of microcrystals of PA6 decreased during pulverization.…”

Section: Introductionmentioning

confidence: 99%

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Study on morphology of compatibilized poly (vinyl chloride)/ultrafine polyamide‐6 blends by styrene–maleic anhydride

Xiong

Wang

et al. 2005

J of Applied Polymer Sci

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Ultrafine polyamide-6 (UPA6) with a size of 4 -8 m was prepared via jet-milling. Blends of poly (vinyl chloride) (PVC) and UPA6 using a reactive copolymer styrene-maleic anhydride (SMA-18%) were prepared. The change in morphology and structure of the blends were studied using differential scanning calorimetry, scanning electron microscopy, and X-ray diffraction. The blend behavior was also determined experimentally using dynamic mechanical analysis. Contrasted to the original PA6, the crystallinity of the UPA6 decreased, the size of its crystallites were reduced, and its melting point decreased to 175°C. In all blends, PVC formed the continuous matrix phase. SMA is miscible with PVC and tends to be dissolved in the PVC phase during the earlier stages of blending. The dissolved SMA has the opportunity to react with PA6 at the interface to form the desirable SMA-g-PA6 copolymer. This in situ formed SMA-g-PA6 graft copolymer tends to anchor along the interface to reduce the interfacial tension and results in finer phase domains. Cocrystallity existed in PVC/(UPA6/ SMA) at a ratio of 82/(18/5).

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“…It is evident that the size of microcrystals and the crystallinity of PA6 decreased during pulverization. This is consistent with earlier reported results 13…”

Section: Resultssupporting

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Study on morphology of compatibilized poly (vinyl chloride)/ultrafine polyamide‐6 blends by styrene–maleic anhydride

Xiong

Wang

et al. 2005

J of Applied Polymer Sci

View full text Add to dashboard Cite

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“…PA6 has been one of the most widely used engineering thermoplastics due to its several distinctive engineering properties, such as elasticity, mechanical properties, stiffness, abrasion resistance, oil resistance, and chemical resistance. But there are few papers related to the blending of PVC and PA6 because the huge difference of their processing temperatures becomes the main obstacle to the blending of PVC and PA6 [10][11][12][13] . The processing temperature of PVC is 170-190°C, whereas the melting point of nylon 6 is 215°C.…”

Section: Introductionmentioning

confidence: 99%

Polymer Blends of Poly(Vinyl Chloride) and Lower-Melting Point Polyamide-6 Compatibilized by Epoxy

Gan

Li³

et al. 2012

AMR

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Lower-melting point polyamide-6 (LPA6) with the melting point of 198°C was prepared through melting extrusion. Blends of poly (Vinyl Chloride) (PVC) and LPA6 which use epoxy (EP) as compatibilizer were prepared by blending PVC and LPA6. The effects of the composition of PA6 and epoxy on the morphology and mechanical properties were investigated by differential scanning calorimetry (DSC), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The behavior of the blends was also determined experimentally using the dynamic mechanical analysis (DMA). Experiments revealed that, the epoxy resin F51 plays a compatibilizer. The more of the content of epoxy resin, the better of compatibility between PVC and PA6. With the increase of PA6, the degree of crystallization, crystallization rate and the regularity of crystal grain increased, the tensile strength declinged, the flexural strength and notched impact strength increase first and then decrease, both of then had an extreme value when the content of PA6 is 20wt%.

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Microstructural changes in homopolymers and polymer blends induced by elastic strain pulverization

Ahn

Khait

Petrich

1995

J of Applied Polymer Sci

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SYNOPSISA novel polymer processing technique known as elastic strain pulverization (ESP) involves the simultaneous effects of high pressure and shear deformation to pulverize polymers. Homopolymers'and blends of commercially important postconsumer plastics, including high-density and low-density polyethylene (HDPE, LDPE), polypropylene (PP), and polystyrene (PS) are studied by several characterization techniques to determine the effects of ESP on the microstructure. Electron spin resonance spectroscopy confirms that free radicals are generated by the mechanical rupture of main chain carbon bonds during pulverization by ESP. The possibility of these free radicals terminating by heterogeneous combination to form compatibilizing block or graft copolymers in coprocessed polymer blends establishes the potential of ESP in commingled plastics recycling. Differential scanning calorimetry (DSC) and polarized light microscopy of homopolymers and blends indicate that crystalline structure is drastically altered by ESP processing. Spherulite size reduction is also observed in both crystalline/crystalline and crystalline/amorphous blends after ESP. These results are consistent with homogenization that may be due to the formation of compatibilizing copolymers by heterogeneous macroradical combination. 0

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Production of highly disperse powder materials based on thermoplastics and thermoplastic blends by elastic-deformation grinding

Cited by 10 publications

References 2 publications

Study on morphology of compatibilized poly (vinyl chloride)/ultrafine polyamide‐6 blends by styrene–maleic anhydride

Study on morphology of compatibilized poly (vinyl chloride)/ultrafine polyamide‐6 blends by styrene–maleic anhydride

Polymer Blends of Poly(Vinyl Chloride) and Lower-Melting Point Polyamide-6 Compatibilized by Epoxy

Microstructural changes in homopolymers and polymer blends induced by elastic strain pulverization

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