Measurement Techniques and Methods for the Pressure Coefficient of Viscosity of Polymer Melts

<div>Determination of <svg height="14.8173pt" id="M28" style="vertical-align:-5.52897pt" version="1.1" viewbox="-0.0498162 -9.28833 12.5752 14.8173" width="12.5752pt" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"><g transform="matrix(.013,0,0,-0.013,0,0)"><path d="M558 587C558 666 497 712 432 712C379 712 330 691 284 650C212 586 178 508 148 348L71 -65C49 -185 35 -229 23 -235L27 -261C49 -259 101 -251 124 -224C131 -216 138 -178 159 -24C171 66 197 200 227 356C264 550 295 668 393 668C443 668 479 632 479 575C479 516 446 458 383 418C361 404 344 398 318 397L296 350C395 338 460 281 460 192C460 110 411 40 300 40C258 40 215 55 192 69L181 51C191 18 222 -16 266 -16C308 -16 351 1 397 26C471 67 545 142 545 221C545 315 486 365 401 395C469 437 558 498 558 587Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,12.192,2.976)"><path d="M-167 575C-167 606 -190 630 -220 630C-248 630 -273 606 -273 575C-273 546 -248 521 -220 521C-190 521 -167 546 -167 575Z"></path></g><g transform="matrix(.0091,0,0,-0.0091,7.228,3.132)"><path d="M493 373C493 420 472 451 445 451C421 451 400 435 400 410C400 404 402 400 406 394S417 371 417 350C417 259 317 128 256 55H254C260 126 256 262 238 340C219 424 194 451 163 451C128 451 78 413 24 329L52 302C89 353 106 370 121 370C129 370 137 363 147 336C186 231 196 73 184 -16C152 -88 120 -192 112 -238L130 -257C157 -253 213 -227 231 -213C231 -187 234 -77 240 -23C251 -6 277 30 309 69C424 208 493 299 493 373Z"></path></g></svg> at several shear rates for PMMA (<i>T</i> = 210°C) [<a href="/journals/apt/2023/2020247/#B16">16</a>].</div>

Advances in Polymer Technology

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Figure 8

Figure 8: Measurement Techniques and Methods for the Pressure Coefficient of Viscosity of Polymer Melts 