Uv curing cell for an individual arrangement of optical components p022 170kb. Publication iv examined the experimental and analytical practice and errors in uniaxial extension experiments by sentmanat extensional rheometer ser. Although originally developed as an extensional rheometer, this highly versatile miniature test platform. Xpansion instruments extensional rheology and material. The ser is completely integrated in the firmware and software of your mcr rheometer. Extended material characterization anton paar gmbh. Measurement technique and data analysis of extensional. Martin sentmanat and can be adapted to the haake mars rheometer. The ser system, exclusively built by xpansion instruments, was developed by dr. Sentmanat extensional rheometer shorter sertool, which can potentially pr. A rheometer is a laboratory instrument used to measure the way in which a liquid responds to applied forces. Convection oven with camera, air or nitrogen gas purge environment. The rstcps rheometer is great for cone and plate as well as plate to plate system for small volumes and wide shear rate ranges.
Extensional rheology in polymer processing extensional flows dominate many polymer processes, including blow molding, film blowing, fiber spinning, thermoforming and many others. The thinning and breakup of a fluid filament that is analyzed with the haake caber 1 capillary breakup extensional rheometer provides valuable information on a material. Visualization of elongation measurements using an ser universal. We use a new extensional rheology test fixture that has been. The ser system is a new accessory for the haake mars with ctc oven which transforms a rotational shear rheometer in an extensional rheometer for melts and semisolids the measuring principle of the ser system, which was developed by dr. The operat ing temperature range of the ser tool covers 0 c to 315 c.
Martin sentmanat, consists of two counterrotating drums with intermeshing gears and lowfriction bearings. The sentmanat extension rheometer ser 3 extensional rheology system, developed by dr. Says tim haake, general manager at goettfert, extensional or elongational viscosity is important for film, fiber, and foam processing as well as blow molding and is not obtainable with a typical rheometer. Vane rotors for pressure cells for haake mars and haake rheostress 6000 p021 122kb. Inflation methods fiber spinning extensional rheology tubeless siphon bubble collapse stagnation flows extensional rheology. Look up words and phrases in comprehensive, reliable bilingual dictionaries and search through billions of online translations. The rotational movement of the rheometer is directly transferred to both drums, which stretch the sample uniformly over the entire stretching area to ensure reliable results. Comparison between extensional rheological properties of. A portable extensional rheometer for measuring the. Rheometer is a sophisticated equipment that has provision to set and measure more parameters to understand the flow behavior of fluids that cannot be represented by a single value of viscosity, also called complex fluids or soft matter.
An extension for thermo fisher scientifics haake marsmodular advanced rheometer systemturns a conventional steady rotational rheometer into an extensional rheometer for melts and semisolids. Extensional flows dominate many polymer processes, including blow molding, film blowing, fiber spinning, thermoforming and many others. Martin sentmanat xpansion instruments, is based on clamping the sample on two counter rotating windup drums. Extensional rheology is the science associated with flow and deformations involving the elongation, or stretching, of materials. Xpansion also provides technical service and support, custom material testing and processing equipment design services, test. Within the presented research, we utilized a nonstandard technique, i. A film of polymer is wound on two rotating drums, which apply constant or variable strain rate extensional deformation on the polymer film. Microfluidic convergingdiverging channels optimised for. It makes use of a userfriendly software called rheoplus. Extensional rheometer cser using three different pe materials. By controlling the motor rotation and operating temperature of the host station, the ser can be used to characterize extensional melt flow. Xpansion instruments is an innovative scientific instrument manufacturer and world leader in extensional melt rheometer technology, and miniaturescale physical material characterization specializing in rheometer and material testing and processing equipment design, extensional rheology, miniature and broadrange physical material characterzation such as tensile, fracture, tear, adhesion, friction, and peel testing of plastic, rubber, and polymer composite materials. Pressure dependence of viscosity of polymers and its importance to.
Thermohaake rs600 rheometer complete package with dell pc and windows software, peltier heatcool control, cone plate, plateplate configuration. Haaketm rheowintm measuring and evaluation software. The device was successfully employed in a field study investigating pitcher plant fluids in borneo in 2014. Sentmanat extensional rheometer ser for the thermo. The ser is connected via the ser base adapter to the ser bracket, mounted to the test head of the rheometer. Extensional simplifying flows aids characterization. The portable rheometer allows, for the first time, natural complex fluids such as pitcher plant trapping fluid to be studied in an ecological context. Extra modules increase applications for haake rheometer.
Measurement technique and data analysis of extensional viscosity for polymer melts by sentmanat extensional rheometer ser article pdf available in rheologica acta 494. The extensional rheology system ser turns the rheometer into a universal platform for extensional. Different commercial ferrofluids ffs, consisting of a set of six ferrofluids with different magnetic saturation and particle concentration, were characterised in a capillary breakup extensional. Xpansion instruments is the exclusive manufaturer of the ser sentmanat extensional rheometer universal testing platform, the new paradigm in extensional melt rheology and physical material characterization technology. The new physica mcr rheometer series is the result of this process. Sentmanat extensional rheometer ser for the thermo scientific. Analysis of extensional viscosity for polymer melts by sentmanat extensional rheometer ser. While viscosity is a measurement usually applicable in determining the resistance of a fluid, a rheometer is used to measure fluids that cannot be defined by a single viscosity value. Rheocalct software can analyze data, generate multiple plot overlays, print tabular data, run math models and perform other timesaving routines. Depending on the extensional rate strain hardening occurs at different times. Patented several years ago, goettferts rheotens is. The miniature ser fixture can be easily attached to the rotational rheometer host station and configured to operate with the existing control software. In the present work, we overcome the challenge of nonhomogeneity of the velocity field by optimising the shape of a convergingdiverging channel to generate the ideal strainrate profile along the centreline of the flow for use in elongational studies of macromolecules e.
Measurement technique and data analysis of extensional viscosity. In these processes, the occurrence of strain hardening response is desirable and elongational rheology data can. Extensional viscosity was measured using the ser device in mcr301 rheometer with ctd450 convection oven anton paar at constant hencky strain rates from 0. The haake caber 1 capillary breakup extensional rheometer is the only commercially available extensional rheometer to quantify elongational properties of fluids or semisolids. Furthermore, a test method and a sample preparation. The evfs compact, frictionfree, design delivers the ideal platform for performing extensional measurements that complement traditional shear rheology. The measuring principle of the ser sentmanat extension rheometer system is based on clamping a sample between two counterrotating windup drums. The sentmanat extensional rheometer ser is actually a fixture that can be field installed on shear rheometers. This calls for a navigation tool that gives users the complete overview as well as the exact insights they require. Figure 1 schematic diagram of a filament stretching extensional rheometer fiser. Anton paars new rheocompass software, the most innovative stateoftheart. Transient extensional viscosity of lowdensity polyethylene was measured by sentmanat extensional rheometer in combination with mcr301 rheometer anton paar at different temperatures.
Measuring the extensional viscosity can reveal a lot of critical information about the behavior of polyolefins under during fiber spinning or film blowing. The seymour concept for a portable extensional rheometer has been demonstrated. The ser sentmanat extension rheometer system extends a conventional steady rotational rheometer into a robust extensional rheometer for melts and semisolids. Universal extensional fixture and sentmanat extension. The combination of convection and radiation heating in the ctc guarantees fast temperature changes and an even temperature distribution within the sample. Extensional rheology system supports melts and semisolids. Extensional rheometry of polymeric fluids and the uniaxial. The extensional properties of the sample are calculated automatically and presented directly in the software.
Rheological characterization of polymer melts in shear and. The second drum is driven by the first, at the same rotation speed in opposite direction by a set of spur. Described is a detachable fixture for a rotational rheometer, the sentmanat extensional rheometer universal testing platform, which incorporates dual windup drums to ensure a truly uniform extensional deformation during uniaxial extension experiments on polymers melts and elastomers. Rheo logical characterization and modeling of linear and branched metallocene polypropylenes prepared by reac. The mcr rheometer series from anton paar offers you one thing first and foremost. The extensional characterization was performed by using the new extensional rheometer serhva01 from xpansion instruments, akron, oh, 14. In this study, we propose a new way of optimising the formulation of ferrofluids for oilspill cleanup processes, based on the rheological behaviour under extensional flow and magnetic fields.
The rheology of polymeric materials under extensional flows can differ significantly from shear flows and it is important to understand this in order to optimize both materials and processes. Tensile properties of mineral fibers determined with. Used in combination with the ser system, the xim miniature mixer attachment converts your rheometer into a miniature. Thermo scientific haake rheometer accessories rheology. Development of a novel and dynamic shear rheometer based. The brookfield rstsst touch screen rheometer is used worldwide for testing pastes, slurries and materials with particulates for yield stress, shear modulus, recovery and creep. Modifying the calculation by taking into account the changes in sample geometry due to thermal expansion and. Keywordssersentmanat extensional rheometeruniaxial. With accessories for practically every application and software for all user levels, thermo scientific haake rheometers are versatile, innovative instruments proven to. Figure 3 shows the results of measurements on branched ldpe performed with a mars rheometer and the ser tool. Measuring the transient extensional rheology of polyethylene melts. Extensional rheology in polymer processing ta instruments. The ser drive shaft connects the motor spindle to the ser, and aligns the motor spindle with the primary rotating drum.
Issues related to the experimental procedure, namely fixing the sample and controlling the temperature, as well as correction for true sample dimensions in calculation of extensional viscosity of polymer. Ser sentmanat extensional rheometer tool for extensional properties universal adaptersfor individual rotors, e. Influence of processing aids on the uniaxial extensional behavior of metallocene polyethylenes. Get ahead of the competition with new, modular advanced rheometer systems for faster, comprehensive material characterization.
Full integration in rheometer software temperature ramps at constant rh rh ramps at constant temperature works with single motor and double motor rheometer large range of different geometries. At time t 0, the upper plate is set in motion and the resulting midpoint radius of the filament rtmid and tensile force ftz exerted by the elongating column are measured. Powerful rheovision software is supplied with the pvs rheometer for full automation and control of all test parameters and comprehensive data collectionanalysis. Relative humidity as a new parameter in rheological testing. Ser extensional rheology system for thermo scientific haake mars p019 4kb. Haake caber 1 capillary breakup extensional rheometer. Srf, uxf, ser, tribo, pp, cp, modified ring dent, tack, relative humidity or moisture content is a crucial parameter in many different applications. Utilising a new generation inline servo motor coupled with digital servo drive technology, the rheoline multifunction rheometer mfr lite is complete with our labline lite software to ensure the highest standards precision of analytical and statistical data of elastomeric properties. The stress is determined from the torque exerted by the drums. With the user interface of the rheocompass software you can run fully automated. Processes free fulltext extensional magnetorheology.
1519 704 782 1597 1113 701 449 742 993 500 605 1458 488 609 337 445 302 1071 44 804 575 718 1074 817 189 1599 1167 710 279 764 229 1426 100 655 449 1161 1247 102 690 245