Page 87 - 《橡塑技术与装备》英文版2026年3期

MATERIALS AND FORMULATIONS

process, it can blend with rubber and undergo a crosslinking the instant fluid black gold rubber replacement formula to
reaction, forming a network-like spatial structure. the formulation, the glass transition temperature remains
2.2 Physical properties essentially unchanged, the tanδ at 0℃ increases, and the tanδ
The physical properties of the rubber compound are at 60℃ slightly decreases, which is beneficial for reducing
shown in table 3. the hysteresis loss of the rubber. DMA data indicates that the
Table 3 Physical properties of rubber compound substitution of instant fluid black gold rubber for operating
Formula Number oil in the formulation does not significantly affect the glass
Project # # # #
1 2 3 4
Density / (g·cm⁻³) 1.141 1.141 1.142 1.142 transition temperature and positively contributes to improving
Shore A hardness/degree 65 65 65 66 the wet grip performance and reducing heat build-up of the
300% modulus/MPa 10.8 11.1 11.5 12.1
Tensile strength/Mpa 18.5 18.9 19.3 19.2 rubber compound.
Elongation at break, % 480 480 475 460
Tear strength / kN.m -1 66 70 75 76
DIN abrasion index /% 105 109 115 120
Akron abrasion index /% 110 118 120 124
After aging at 100℃ for 24 hours
Shore A hardness/degree 70 71 70 72
300% modulus/MPa 13.5 13.8 13.6 14.5
Tensile strength / Mpa 14.1 14.8 15.1 15.1
Elongation at break, % 390 380 380 365

From table 3, it can be seen that the addition of instant
fluid black gold rubber maintains the hardness and enhances
the tensile strength and modulus of the rubber compound. As
Figure 1 tanδ-temperature relationship curve of
the dosage increases, the elongation at break tends to decrease. vulcanized rubber
In practical applications, appropriate substitution ratios can
be formulated according to performance requirements. It 2.4 Low temperature performance
can effectively improve the wear resistance of the tread and The hardness increase of vulcanized rubber at low
enhance the tear resistance. The tensile properties remain good temperatures is shown in table 5.
after aging. Table 5 Shore A hardness of vulcanizate during low-
temperature storage
The data indicates that in this collaborative experiment, Formula Number
Temperature
using instant fluid black gold rubber to replace the existing 1 # 2 # 3 # 4 #
25 65 65 65 66
operating oil in the formula at different proportions, with a 0 68 68 68 69
replacement ratio of 30%~50% being optimal. -10 71 71 71 72
-20 73 73 73 73
2.3 Dynamic performance -30 75 76 76 76
The dynamic properties of the rubber compound are
shown in table 4: Place the vulcanizate test pieces at constant temperatures
Table 4 Tg and tanδ of rubber compound of 25℃, 0℃, -10℃, -20℃, and -30℃, respectively, and
Formula Number measure the hardness after the same duration of storage to
Project
1 # 2 # 3 # 4 #
T g /℃ -44.7 -44.3 -44.1 -43.8 study the changes in hardness under various temperature
tanδ(0℃） 0.209 0.215 0.221 0.224 conditions after substitution at different proportions. As can
tanδ(60℃） 0.158 0.155 0.149 0.147
be seen from table 5, after substituting the environmentally
The tanδ-temperature relationship curve of vulcanized friendly aromatic oil in the instant fluid black gold rubber
rubber is shown in figure 1. formula, the Shore A hardness of the vulcanizate increases
From table 4 and figure 1, it can be observed that after almost uniformly at low temperatures, without affecting the
adding the environmentally friendly aromatic oil used in low-temperature performance of the rubber compound. This is

Vol.52，2026 ·41·