This International Standard specifies, for general-purpose chloroprene rubbers (CRs):<\/p>\n
physical and chemical tests on raw rubbers;<\/p>\n<\/li>\n
standard materials, standard test formulations, equipment and processing methods for evaluating the vulcanization characteristics.<\/p>\n<\/li>\n<\/ul>\n
General-purpose chloroprene rubbers fall into three broad classes based on the type of polymerization modifier used in their preparation:<\/p>\n
sulfur-modified types;<\/p>\n<\/li>\n
mercaptan-modified types;<\/p>\n<\/li>\n
types modified by other products.<\/p>\n<\/li>\n<\/ol>\n
For class c), the procedure for either a) or b) may be followed.<\/p>\n
| PDF Pages<\/th>\n | PDF Title<\/th>\n<\/tr>\n | ||||||
|---|---|---|---|---|---|---|---|
| 7<\/td>\n | 1 Scope 2 Normative references <\/td>\n<\/tr>\n | ||||||
| 8<\/td>\n | 3 Sampling and sample preparation 4 Physical and chemical tests on raw rubber 4.1 Mooney viscosity 4.2 Volatile matter 4.3 Ash 5 Sulfur-modified chloroprene rubbers \u2014 Preparation of the test mix for evaluation 5.1 Standard test formulation <\/td>\n<\/tr>\n | ||||||
| 9<\/td>\n | 5.2 Procedure 5.2.1 Equipment and procedure 5.2.2 Premastication 5.2.3 Mill mixing procedure <\/td>\n<\/tr>\n | ||||||
| 10<\/td>\n | 6 Mercaptan-modified chloroprene rubbers \u2014 Preparation of the test mix for evaluation 6.1 Standard test formulation <\/td>\n<\/tr>\n | ||||||
| 11<\/td>\n | 6.2 Procedure 6.2.1 Equipment and procedure 6.2.2 Premastication <\/td>\n<\/tr>\n | ||||||
| 12<\/td>\n | 6.2.3 Mill mixing procedure <\/td>\n<\/tr>\n | ||||||
| 13<\/td>\n | 7 Preparation of the test mix for evaluation of sulfur-modified or mercaptan-modified chloroprene with miniature internal mixer (MIM) 7.1 Standard test formulations 7.2 Procedure <\/td>\n<\/tr>\n | ||||||
| 14<\/td>\n | 8 Evaluation of vulcanization characteristics by a curemeter test 8.1 Using an oscillating-disc curemeter 8.2 Using a rotorless curemeter 9 Evaluation of tensile stress-strain properties of vulcanized test mixes <\/td>\n<\/tr>\n | ||||||
| 15<\/td>\n | 10 Precision 11 Test report <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":" Chloroprene rubber (CR). General-purpose types. Evaluation procedure<\/b><\/p>\n |