Solid phase preparation and use of organic modified calcium based montmorillonite

[0028] Example 1:

[0029] Weigh 100g of calcium-based montmorillonite, 1g of dodecyltrimethylammonium chloride (DTAC) and 5g of coupling agent vinyltriethoxysilane, mix them together, stir and react in a solid phase at 100℃ for 240min; The organic montmorillonite is obtained after the reaction product is discharged, which is recorded as DTAC-151.

[0030] Add various compounding agents and vulcanizing agents and the organic montmorillonite obtained above according to the following formula. The formula is: 100 parts of styrene butadiene rubber (SBR), 2 parts of stearic acid; 5 parts of zinc oxide; 1.5 parts of accelerator CZ; Agent DM 0.5 parts; sulfur 2 parts; montmorillonite variable. According to this formula, SBR/DTAC-151 composites were prepared with different amounts of DTAC-151 and styrene butadiene rubber, and the vulcanized rubber properties were tested. After the rubber compound is parked for one night, vulcanize, prepare test strips according to relevant test standards and test their properties. Table 1 shows the mechanical properties of the styrene-butadiene rubber/organic modified montmorillonite composite material, where SBR/DTAC-151 (30 parts) means that the addition amount of DTAC-151 in the styrene-butadiene rubber/DTAC-151 composite material is 30 parts.

[0031] Table 1

[0032]

[0033] It can be seen from Table 1 that the mechanical properties of SBR/organic montmorillonite are significantly better than those of SBR/unmodified original soil and pure SBR, and the mechanical properties are improved significantly. When the amount of organic montmorillonite is about 30 parts, the mechanical properties of SBR/organic montmorillonite reach the best. figure 1 It is the XRD pattern of styrene-butadiene rubber/DTAC-151 composite. Curve 1 in the figure is the XRD pattern of calcium-based montmorillonite; curve 2 is the XRD pattern of styrene-butadiene rubber/DTAC-151 composite. It can be seen from the figure that the composite material, The interlayer spacing of some organic montmorillonite has been extended to 4.7nm. This shows that the SBR molecular chain has intercalated into the montmorillonite layer.

[0034] Example 2

[0035] Weigh 100g calcium-based montmorillonite, 10g dodecyltrimethylammonium chloride (DTAC) and 3g coupling agent bis[3-(triethoxysilyl)propyl]tetrasulfide and mix them together. The solid-phase stirring reaction was carried out at 100°C for 120 minutes; the organic montmorillonite obtained by discharging the above reaction product was recorded as DTAC-si69.

[0036] According to the formula of Example 1, SBR/DTAC-si69 composite materials were prepared with different amounts of DTAC-si69 and styrene butadiene rubber, and the properties of the vulcanized rubber were tested. It can be seen from Table 2 that the mechanical properties of styrene-butadiene rubber/organic modified montmorillonite composite materials show that the addition of DTAC-si69 makes the mechanical properties of composite materials significantly better than styrene-butadiene rubber/unmodified montmorillonite and pure styrene-butadiene rubber. . figure 2 It is the XRD pattern of styrene-butadiene rubber/DTAC-si69 composite. Curve 1 in the figure is the XRD pattern of calcium-based montmorillonite; curve 2 is the XRD pattern of styrene-butadiene rubber/DTAC-si69 composite. It can be seen from the figure that the composite The interlayer spacing of montmorillonite is increased from 1.53nm to 4.5nm. It shows that the organic montmorillonite obtained by the method of the present invention has been successfully prepared into an intercalation polymer/montmorillonite composite material.

[0037] Example 3

[0038] Weigh 100g of calcium-based montmorillonite, 20g of tetraethylenepentamine and 1g of coupling agent vinyltriethoxysilane and mix them together, and stir the reaction in a solid phase at 80°C for 240min; the above reaction product is discharged to obtain the organic montmorillonite Destroy.

[0039] Take 6g of the organic montmorillonite prepared in Example 3, according to the basic formula of the rubber compound: 100 parts of natural rubber NR, 2 parts of stearic acid; 5 parts of zinc oxide; 1.5 parts of accelerator CZ; 0.5 parts of accelerator DM; sulfur 1.5 parts; 6 parts of montmorillonite, prepared composite material, vulcanized after parking overnight, vulcanization condition 143℃×normal vulcanization time (t 90 ). The properties of the composite material vulcanizate prepared in Example 3 are shown in Table 3 for the mechanical properties of natural rubber/organic montmorillonite. It can be seen from Table 3 that the addition of organic montmorillonite significantly improves the mechanical properties of the composite material.

[0040] Table 2

[0041]