Question

2. A. Newtonian flow follows the relationship t = 77. What is non-Newtonian flow behavior? (4 pts) B. Make a plot of shear stress versus shear rate to illustrate the difference between shear thinning and a Newtonian fluid. (5 pts) C. What quantity is measured for determining the melt flow index? How does this relate to the melt viscosity of a polymer? (4 pts) D. Sketch the geometry of a cone and plate viscometer and describe how it works. What advantage dos this have over other viscometer geometries? (4 pts) E. Describe die swell and explain what causes it. (4 pts)

Answer 1

2. Thousand WEDNESDAY JUNE DAY 163-202 WEEK 24 9.00 10.00 In newtonian flow, shear stn pedige is dirett proportional to Rate of shear strain. 4 1- 4. du An non-newtonial fluid 2 Okum A4 Все 9 constants of values n vary according to liquid material 11.00 12.00 1.00 Shear skem Pseudoptastic fluid Newtonian huid 3.00 Shear thinning fluid is aho called of Pseudoplastic fluit where Walue of net & B to 4.00 Sheer nate 5.00 is exprened in grams o 500 Melt How Index (MFI) polymen per 10 minutes of duration of test. Polymer Procenon unually correlate the value o mith with the polymen grade that they have to choose to different proceness, UN 10 M . T . W . T . F S S M T W T F S S M T W T F F S S M T W T F S S M 1 . 1 2 3 4 5 6 7 8 9 10 1 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 A leader needs enough understanding to fashion and TWTFSS 25 26 27 28

isand 19 THURSDAY JUNE DAY 164-201 WEEK 24 Dar 1949) Weeze 13 Cone f Plate Viscometers is used for menuring dynamic vircosity measurements. is type of vincometers work by getting the measurements of the torque on a vestical stand that moves the spindle in rotational direction. Rotation is dependent upon virconity then this me ined to measue vine