SEM photographs of the tensile fractured surface of NR–PBR,
NR–PBR/RR (80/20), NR–PBR/RR (60/40) and NR–PBR/RR (40/60)
(Fig. 3a–d) are taken to study the phase morphological structure
and homogeneity of the vulcanizate. The micrograph of pure NR–
PBR vulcanizate shows homogeneous structure. The RR containing
vulcanizates contain several number of crack paths in different
directions with number of holes, making the vulcanizate vulnerable
under mechanical stress. From the micrograph it is also evident
that, with the increase in the proportion of RR, the number of crack
paths in different directions and holes increases. The micrograph
also indicates that the fractured surface of the NR–PBR/RR (40/
60) vulcanizate has less homogeneity than that of the NR–PBR/
RR (80/20) vulcanizate, due to the presence of higher proportion
of RR in the blend vulcanizate. Here, in case of RR containing vulcanizate,
the fracture mode shows the failure mode which is less
rubbery in nature due to higher crosslink density of the
vulcanizate.
SEM photographs of the tensile fractured surface of NR–PBR,NR–PBR/RR (80/20), NR–PBR/RR (60/40) and NR–PBR/RR (40/60)(Fig. 3a–d) are taken to study the phase morphological structureand homogeneity of the vulcanizate. The micrograph of pure NR–PBR vulcanizate shows homogeneous structure. The RR containingvulcanizates contain several number of crack paths in differentdirections with number of holes, making the vulcanizate vulnerableunder mechanical stress. From the micrograph it is also evidentthat, with the increase in the proportion of RR, the number of crackpaths in different directions and holes increases. The micrographalso indicates that the fractured surface of the NR–PBR/RR (40/60) vulcanizate has less homogeneity than that of the NR–PBR/RR (80/20) vulcanizate, due to the presence of higher proportionof RR in the blend vulcanizate. Here, in case of RR containing vulcanizate,the fracture mode shows the failure mode which is lessrubbery in nature due to higher crosslink density of thevulcanizate.
การแปล กรุณารอสักครู่..
