Jul 05, 2004· Preparation of polypropylene/carbon nanotube composite powder with a solid-state mechanochemical pulverization process Hesheng Xia, Qi Wang …
1.2. Solid-state shear pulverization: A new strategy for producing polyolefin/CNC composite materials Here, we employ a single-step, solventless, continuous and industrially scalable process called solid-state shear pulverization (SSSP) [14,15,19,89e103] to produce green composites of poly-
Here we employ solid-state shear pulverization (SSSP) to produce polymer-graphite nanocomposites that are not subject to the thermodynamic/kinetic limitations associated with con-ventional processes. With SSSP, a modified twin-screw extruder applies shear and compressive forces to …
Oct 06, 2014· Here, we investigate the potential of using a single-step, continuous, and industrially scalable process called solid-state shear pulverization (SSSP),,,,,,,,,,,,,,,, to produce well-dispersed, green composite materials of PP/ES with significant property enhancements (Fig. 1b). Although the current study employs a lab-scale/pilot-plant apparatus, polyolefins have been processed ...
Sep 07, 2006· Nanoblends, in which dispersed-phase domains exhibit length scales of order 100 nm or less, are made using a continuous, industrially scalable, mechanical process called solid-state shear pulverization (SSSP).An 80/20 wt% polystyrene (PS)/poly(methyl methacrylate) (PMMA) blend processed by SSSP and consolidated by platen pressing, without melt processing, exhibits a quasi …
Mar 27, 2012· Krishnan A. Iyer, John Lechanski, John M. Torkelson, Green polypropylene/waste paper composites with superior modulus and crystallization behavior: Optimizing specific energy in solid-state shear pulverization for filler size reduction and dispersion, Composites Part A: Applied Science and Manufacturing, 10.1016/j.compositesa.2015.09.011, 83 ...
Jul 01, 2012· Free Online Library: Processing-structure-property relationships in solid-state shear pulverization: parametric study of specific energy.(Report) by "Polymer Engineering and Science"; Engineering and manufacturing Science and technology, general Chemical processes Research Polymer composites Chemical properties Composition Identification and classification Production processes …
A continuous, solventless, scalable process called solid-state shear pulverization (SSSP) in conjunction with melt mixing (MM) to produce well-dispersed polymer/multiwall CNT (MWCNT ...
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Apr 30, 2001· A single screw extruder was used to pulverize rubber granulates at high shear and compression without using cryogenic fluid for cooling. This process, solid-state shear extrusion (SSSE), is based on the large compressive shear deformation of rubber granulates, which results in the storage of a large amount of strain energy and the formation of cracks.
Major Property Enhancements by Solid-State Shear Pulverization John M. Torkelson 1-3, Philip J. Brunner 1,3, and Neil Kane 3 1 Department of Materials Science and Engineering, Northwestern University, Evanston, IL 60208-3120
PSP is a proprietary, non-extrusion process and is realized inside a specially designed pulverization head. It is very different from cryogenic grinding, various versions of solid state shear extrusion (SSSE), and other size reduction processes.
Solid-state shear pulverization (SSSP) is a continuous process that overcomes challenges in producing well-dispersed polymer composites that cannot be made by twin-screw melt extrusion. We use SSSP to produce 85/15wt% polypropylene/waste paper biocomposites with polypropylene pellets and 2-cm-square waste paper pieces as starting material.
Sep 15, 2014· Solid-state shear pulverization uses a twin-screw melt extruder modified with a cooling system to maintain the polymer in the solid state,,,,,,,,,,, . This process is accompanied by high shear stresses and compressional forces that cause repeated fragmentation and fusion of material; conditions are tuned by feed rate, screw speed ...
Apr 01, 2016· Solid-state shear pulverization (SSSP) is a continuous process that overcomes challenges in producing well-dispersed polymer composites that cannot be made by twin-screw melt extrusion. We use SSSP to produce 85/15 wt% polypropylene/waste paper biocomposites with polypropylene pellets and 2-cm-square waste paper pieces as starting material.
Furthermore, E p has been measured for simple pulverization of rubber granules with a single screw solid-state shear extruder [46]. Although the relevant E p equations vary slightly among these ...
We have previously shown that solid-state shear pulverization (SSSP) can yield well-dispersed, compatibilized polymer blends. Here we show that SSSP can be applied to polypropylene (PP)-organoclay systems to yield well-exfoliated nanocomposites. Transmission electron microscopy, wide-angle x-ray diffraction (WAXD), small-angle x-ray scattering (SAXS), and DSC (crystallization …
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Nov 05, 2012· 1. A polymer composition comprising a solid-state shear pulverization product of a polyolefin component and as-received graphite, with particles of said graphite dispersed therein, said graphite not a graphite oxide and not an expanded graphite, said composition substantially absent agglomeration of said particles, said dispersion characterized by scanning electron microscopy and …
A two-stage process for recycling of vulcanized rubber was proposed. In the first stage, the vulcanized rubber was shredded into granulates, and then the granulates were pulverized into fine particles using a single screw extruder in the solid state shear extrusion (SSSE) process. In the second stage, the produced rubber powder was compression molded to produce new items.
Dec 27, 2013· Figure 4.26 shows a schematic sectional view of a twin-screw pulverizer (upper drawing) and an elevational view of a representative screw used in practicing the invention when multi-component plastic scrap material is subjected to solid state shear pulverization in the pulverizer barrel (lower drawing). The pulverizer (10) includes a feeder (12 ...
@article{Diop2014WellmixedBO, title={Well-mixed blends of HDPE and ultrahigh molecular weight polyethylene with major improvements in impact strength achieved via solid-state shear pulverization}, author={Mirian F. Diop and Wesley Roth Burghardt and John M. Torkelson}, journal={Polymer}, year={2014}, volume={55}, pages={4948-4958} }
Solid state shear extrusion pulverization: : Ivanov: 5735471: Cryogenic tire disintegration process and apparatus: : Muro: 241/23: 5704555: Single-screw extruder for solid state shear extrusion pulverization and method: : Arastoopour: 5395055: Solid state shear extrusion pulverization: : Shutov et al. 5299744
Mar 09, 2001· Solid state shear extrusion pulverization: : Ivanov: 5704555: Single-screw extruder for solid state shear extrusion pulverization and method: : Arastoopour: 5397065: Solid state shear extrusion pulverization: : Shutov et al. 5356054: Wagon with cutting, mixing and dispensing functions for fodder and grass or straw ...
Solid-state shear pulverization is a unique, emerging processing technique for mechanochemical modification of polymers, compatibilization of polymer blends, and exfoliation and dispersion of fillers in polymer composites.
May 24, 2012· A safety factor austenite B drawbench plate product sheet metal parts billet semifinished product semiconductor element bar bainite grid speed changer gearbox gearbox casing deformation deforming force transformer ...
Oct 24, 2005· The full text of this article hosted at iucr.org is unavailable due to technical difficulties.
Dec 01, 2004· At low screw speeds (i.e., below 200 rpm), "solids pulsing" appears to be the major source of flow variability during extrusion. At higher screw speeds, it has been recently observed (19, 30) that recirculation of solids at the front of the feed opening can have a major disruptive influence on the output rate of the extruder.
This information was used as a guide to obtain optimum operating conditions and design parameters for optimum design of the solid state shear extrusion (SSSE) pulverization process [H. Arastoopour ...
Mar 09, 2015· The SSSP process uses a twin-screw melt extruder modified with a cooling system to maintain the polymer in the solid state,,,,,,,,,,,,, . This process is accompanied by high shear stresses and compressional forces that cause repeated fragmentation and fusion of material; conditions are tuned by feed rate, screw speed, screw design ...
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