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By K.C. Jones, Andrew Tinker

Blends of typical rubber with speciality artificial rubbers, akin to nitrile rubber and ethylene propylene rubbers, have, within the earlier, did not mix the simplest homes of polymers, leading to a terrible go back when it comes to further worth from the mixing technique. The suggestion of mixing man made rubbers with average rubbe is unquestionably now not a brand new one, however it is barely now that this is proven to be attainable with continually confident resluts, yet eh use of novel thoughts which this publication describes, giving necessary details on the expertise required and the consequences that are completed. Blends of traditional Rubber is a useful resource of data for all these operating within the region of rubber know-how and polymer mix expertise.

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Holes around the captured micro-phase can also be observed where the action of sectioning has literally pushed such a region out of its position within the matrix. The removed pieces can often be seen next to the hole, in some cases still attached to some point on the interface. Weak interfacial adhesion within NR/NBR blends has been an important theme running throughout this work: results like these have been vital to the work performed in this field (Chapters 5 to 8). 12, has been included to provide a direct comparison, and to demonstrate the validity of the STEM technique.

S. and Tinker, AJ. (1997) The effect of modifying EPDM on the crosslink distribution in NR/EPDM blends. Accepted for publication in Journal of Natural Rubber Research. 7 Tinker, AJ. (1995) Distribution of crosslinks in vulcanized blends. Rubber Chemistry and Technology, 68(3), 461^80. D. and Vasilenko, LA. (1993) Regulating the degree of cross-linking in phases of elastomer blends on the basis of polyisoprene and polybutadiene. Vysokomolekulyarnye Soedineniya, Series B, 35(10), 1708-1711; translated in Polymer Science, 35(10), 1428-1431.

7 SEM micrograph of a 30:70 NRiNDR blend stained with osmium tetroxide. leaving the ENR-25 phase intact. The final appearance gives a better idea of the three-dimensionality than simple staining would, with the ENR-25 phase taking on the appearance of a sponge. In summary, SEM can be described as a relatively fast technique for observing blend morphology at medium resolution. Nevertheless, the technique is not suitable for observing the internal phase structure of individual phases. To achieve this, sections must be viewed in transmission, as with LM.

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