{"id":305423,"date":"2024-10-19T20:54:11","date_gmt":"2024-10-19T20:54:11","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-6721-102015\/"},"modified":"2024-10-25T18:28:50","modified_gmt":"2024-10-25T18:28:50","slug":"bs-iso-6721-102015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-6721-102015\/","title":{"rendered":"BS ISO 6721-10:2015"},"content":{"rendered":"

This part of ISO 6721<\/span> <\/span> specifies the general principles of a method for determining the dynamic rheological properties of polymer melts at angular frequencies typically in the range of 0,01 rad\u00b7s -1<\/sup> to 100 rad\u00b7s -1<\/sup> by means of an oscillatory rheometer with a parallel-plate geometry. Angular frequencies outside this range can also be used (see Note 1). The method is used to determine values of the following dynamic rheological properties: complex shear viscosity \u03b7<\/i>*, dynamic shear viscosity  \u03b7<\/i>\u2019, the out-of-phase component of the complex shear viscosity \u03b7<\/i>\u201d, complex shear modulus G<\/i>*, shear loss modulus G<\/i>\u201d, and shear storage modulus G<\/i>\u2019. It is suitable for measuring complex shear viscosity values typically up to ~10 MPa\u00b7s (see Note 2).<\/p>\n

\n
\n NOTE 1\n <\/div>\n

The angular-frequency measurement range is limited by the specification of the measuring instrument and also by the response of the specimen. When testing using angular frequencies lower than 0,1 rad\u00b7s \u20131<\/sup>, the test time can increase significantly as the time taken to obtain a single measurement is proportional to the reciprocal of the angular frequency. Consequently, when testing at low angular frequencies, degradation or polymerization of the specimen is more likely to occur and have an effect on the results. At high angular frequencies, the specimen can distort or fracture at the edge, consequently invalidating the test results.<\/p>\n<\/div>\n

\n
\n NOTE 2\n <\/div>\n

The range of complex shear viscosity values that can be measured is dependent on the specimen dimensions and also the specification of the measuring instrument. For a specimen of given dimensions, the upper limit of the range is limited by the machine\u2019s torque capacity, angular-displacement resolution, and compliance. However, correction can be made for compliance effects.<\/p>\n<\/div>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nForeword <\/td>\n<\/tr>\n
7<\/td>\n1\tScope
2\tNormative references
3\tTerms and definitions <\/td>\n<\/tr>\n
8<\/td>\n4\tPrinciple
5\tApparatus
5.1\tMeasurement apparatus <\/td>\n<\/tr>\n
9<\/td>\n5.2\tTemperature-controlled enclosure
5.3\tTemperature measurement and control <\/td>\n<\/tr>\n
10<\/td>\n5.4\tPlate\/specimen assembly
5.5\tCalibration
6\tSampling <\/td>\n<\/tr>\n
11<\/td>\n7\tProcedure
7.1\tTest temperature
7.2\tZeroing the gap
7.3\tIntroducing the test specimen
7.4\tConditioning the test specimen
7.5\tTest mode (controlled stress or controlled strain) <\/td>\n<\/tr>\n
12<\/td>\n7.6\tDetermination of thermal stability of sample material
7.7\tDetermination of region of linear-viscoelastic behaviour
7.7.1\tIn the controlled-strain mode
7.7.2\tIn the controlled-stress mode <\/td>\n<\/tr>\n
13<\/td>\n7.7.3\tConfirmation of linear-viscoelastic behaviour
7.8\tFrequency sweep
7.9\tTemperature sweep
7.10\tAir entrapment
8\tExpression of results
8.1\tSymbols used <\/td>\n<\/tr>\n
14<\/td>\n8.2\tCalculation of complex shear modulus and complex shear viscosity <\/td>\n<\/tr>\n
16<\/td>\n9\tPrecision <\/td>\n<\/tr>\n
17<\/td>\n10\tTest report <\/td>\n<\/tr>\n
18<\/td>\nAnnex\u00a0A (informative) Uncertainty limits <\/td>\n<\/tr>\n
21<\/td>\nAnnex\u00a0B (informative) Verification of rheometer performance <\/td>\n<\/tr>\n
25<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Plastics. Determination of dynamic mechanical properties – Complex shear viscosity using a parallel-plate oscillatory rheometer<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2015<\/td>\n28<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":305427,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1177,2641],"product_tag":[],"class_list":{"0":"post-305423","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-83-080-01","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/305423","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/305427"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=305423"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=305423"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=305423"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}