{"id":306206,"date":"2024-10-19T20:58:27","date_gmt":"2024-10-19T20:58:27","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bsi-20-30406608-dc-2020\/"},"modified":"2024-10-25T18:33:55","modified_gmt":"2024-10-25T18:33:55","slug":"bsi-20-30406608-dc-2020","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bsi-20-30406608-dc-2020\/","title":{"rendered":"BSI 20\/30406608 DC 2020"},"content":{"rendered":"

This document specifies the general principles of a method for determining the transient extensional viscosity of polymer melts. The procedure details the measurement of polymer melt specimens stretched uniaxially under conditions of constant strain rate and constant temperature.<\/p>\n

The method is capable of measuring the transient extensional viscosity of polymer melts at Hencky strain rates typically in the range 0,01 s\u20131<\/sup> to 1 s\u20131<\/sup>, at Hencky strains up to approximately 4 and at temperatures up to approximately 250 \u00b0C (see Notes 1 and 2). It is suitable for measuring transient extensional viscosity values typically in the range from approximately 104<\/sup> Pa\u22c5s to 107<\/sup> Pa\u22c5s (see Note 3).<\/p>\n

\n
\n NOTE 1\n <\/div>\n

Hencky strains and strain rates are used (see Clause 3<\/span>).<\/p>\n<\/div>\n

\n
\n NOTE 2\n <\/div>\n

Values of strain, strain rate and temperature outside these limiting values can be attained.<\/p>\n<\/div>\n

\n
\n NOTE 3\n <\/div>\n

The operating limit of an instrument, in terms of the lowest transient extensional viscosity values that can be measured, is due to a combination of factors, including the ability of the specimen to maintain its shape during testing and the resolution of the instrument.<\/p>\n<\/div>\n

A list of documents related to this document is given in the Bibliography.<\/p>\n","protected":false},"excerpt":{"rendered":"

BS ISO 20965. Plastics. Determination of the transient extensional viscosity of polymer melts<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2020<\/td>\n25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":306212,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[1177,2641],"product_tag":[],"class_list":{"0":"post-306206","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\/306206","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\/306212"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=306206"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=306206"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=306206"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}