Rheology: A Rapid Screening Method for Testing Stability sudip kumar modh 10Ĭapillary extrusion viscometer sudip kumar modh 11
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+parallel plate Rheometer:upper plate is attached to transducer to measure torque resulting fromstrain upon the samplesystem computer compares material stress to input strain anddetermines tan deltaor phase angle along with the storage and loss modulus components sudip kumar modh 9ħ)Suspensions Settling of particles by Brookfield viscometer fitted with helipath attachment Consists of rotating T bar spindle Dial reads resistance at various levels of suspension 8)Ointment Consistency measured by Burrell severs Rheometer with helipath attachment Ointment is loaded into a cylinder and extruded with measured force Amount extruded is measurement of consistency 9)Aerosol Viscosity is measured by Brookfield viscometer 10)Paste capillary extrusion viscometer for the viscosity measurement of fish protein pasteJournal compilation © 2008 Wiley Periodicals, Inc. at gel point tan delta is one parallel plate Rheometer+ is used*Focus on Rheology By Arlon, Materials for Electronics, Inc. Instrument are operated at variety of shear rate can be used -Cup and bob viscometer -cone and plate viscometer sudip kumar modh 5Ĭharacteristics:Capillary viscometerExp Ostwald viscometerBased on poiseuille’s equationAccording to US pharmacopeia capillary apparatus used for high viscousmethyl cellulose type of solutionFalling sphere viscometerExp hoeppler viscometerCup and bob viscometerExp Couette type McMichael searle type Roto viscometer Brookfield viscometer(rotational type of viscometer)cone and plate viscometerExp ferranti-shirley sudip kumar modh 6Īpplication of viscometer in stability and evaluation:1) Polaxomer vehiclesUsed in tear solution for treating “dry eye syndrome “For evaluation computer controlled couette viscometer is used2) SuppositoriesRelease and absorption is depend on rectal temperature,Brookfield viscometer is used study characteristic of triglycerides base at varioustemperature3) EmulsionStabilized with triethanolamine stearate at various temperatureBrookfield viscometer is used4) cosmetic sticksFerranti-shirley cone plate viscometer used Physical pharmacy by martin page 581-582 sudip kumar modh 7ĥ) Tablet Excipient Microcrystalline cellulose is used as granulating agent Mixture torque rheometer is used to measure torque changes as water is added 6)Lamination * process of lamination various stages a) softening point of the resin -resin starts to soften and flow as elastic material drops of viscosity (~107 poise down to 100 to 5000 poise) b) material is most fluid, and reaction rates start to increase as viscosity starts to build as the resin starts to gel.
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RheometerTypes of the viscometer used in industr圜haracteristicsApplication of viscometer in stability and evaluationRheology: A Rapid Screening Method for Testing StabilityLatest types of viscometers and Rheometers sudip kumar modh 3 IntroductionRheology is Responsible for any formulation, production, appearance, usage, andfinally affect stabilityAffects final cost of productClass I recalls of Fentanyl Reservoir patches from Innovator and genericmanufacturersIn short………If a material is pumped, sprayed, extended, extruded, molded, coated, mixed,chewed, swallowed, rubbed, transported, stored, heated, cooled, aged …RHEOLOGY is important ….!! sudip kumar modh 2ĬontentsViscometer vs.
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A seminar on Industrial Aspect of Rheology Presented by Modh Sudipkumar c.