This document describes three methods for the measurement of the change of stress in a test piece at a given elongation for the purpose of determining the ageing characteristics of a rubber.<\/p>\n
Method A is intended for measurement under continuous strain conditions.<\/p>\n<\/li>\n
Method B is the preferred method for measurement under intermittent strain conditions.<\/p>\n<\/li>\n
Method C is an alternative to method B for measurement under intermittent strain conditions in which the test piece is removed from the ageing environment for measurement of the stress at standard laboratory temperature.<\/p>\n<\/li>\n<\/ul>\n
Measurements at a single elevated ageing temperature can be used for quality control purposes as a measure of heat-ageing resistance. Measurements at a number of temperatures can be used for research and development purposes to estimate long-term ageing characteristics in accordance with the procedures described in ISO 11346<\/span><\/span>.<\/p>\n Tests under continuous and intermittent strain conditions measure the results of different processes, and hence do not give the same results. The results of the intermittent methods B and C also cannot be expected to be the same as they use different test conditions.<\/p>\n Rubber, vulcanized or thermoplastic. Determination of ageing characteristics by measurement of stress relaxation in tension<\/b><\/p>\nPDF Catalog<\/h4>\n
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\n PDF Pages<\/th>\n PDF Title<\/th>\n<\/tr>\n \n 2<\/td>\n National foreword <\/td>\n<\/tr>\n \n 6<\/td>\n Foreword <\/td>\n<\/tr>\n \n 7<\/td>\n Introduction <\/td>\n<\/tr>\n \n 9<\/td>\n 1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n\n 10<\/td>\n 4 Principle
5 Apparatus
6 Calibration <\/td>\n<\/tr>\n\n 11<\/td>\n 7 Test pieces
7.1 Type and preparation of test pieces
7.2 Measurement of test piece dimensions
7.3 Number of test pieces
8 Storage and conditioning
9 Test conditions
9.1 Duration of test <\/td>\n<\/tr>\n\n 12<\/td>\n 9.2 Temperature of exposure
10 Procedure
10.1 Method A
10.2 Method B <\/td>\n<\/tr>\n\n 13<\/td>\n 10.3 Method C
11 Expression of results <\/td>\n<\/tr>\n\n 14<\/td>\n 12 Test report <\/td>\n<\/tr>\n \n 15<\/td>\n Annex A (normative) Calibration schedule <\/td>\n<\/tr>\n \n 17<\/td>\n Bibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" \n\n
\n Published By<\/td>\n Publication Date<\/td>\n Number of Pages<\/td>\n<\/tr>\n \n BSI<\/b><\/a><\/td>\n 2021<\/td>\n 18<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":372016,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-372007","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/372007","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\/372016"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=372007"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=372007"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=372007"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}