Role of tris (77-86-1) in different modifications and composites

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Tris (77-86-1) is not only an important biological buffer, but also an important organic synthetic material. It plays different roles in the modification and compounding of different materials.

Modification of hyperbranched Polyimide by tris (77-86-1)

Automobile brake pads are generally composed of steel plate, adhesive insulation layer and friction block. At present, the brake pads on the market mainly use phenolic resin and nitrile rubber, but phenolic resin is harmful to the environment, and the heat-resistant limit temperature is only about 250 ℃. When the temperature is too high, the thermal decomposition phenomenon is quite serious, which will affect the bonding strength between the friction block and the steel plate. In serious cases, the friction block will fall off. Therefore, it is necessary to find a new adhesive insulation material to replace phenolic resin.

In order to solve the problem of reducing the bonding strength of the adhesive insulation layer of the brake pad at high temperature, Tris was introduced into the modified hyperbranched polyimide resin, which improved the mechanical properties and high temperature resistance of the hyperbranched polyimide. At the same time, the end of hyperbranched resin contains a large number of hydroxyl groups, which can be crosslinked to form a stable system. The adhesive prepared by Tris modified hyperbranched polyimide resin can closely bond the friction block with the steel plate, and the bonding strength does not decrease at high temperature.

Modification of polyvinyl alcohol (PVA) by Tris

Polyvinyl alcohol (PVA) is a polymer with multi hydroxyl structure, which has excellent water solubility, mechanical properties, gas barrier and biodegradability. However, the polyhydroxy structure of PVA is easy to form hydrogen bonds between intramolecular chains and molecular chains, which makes the melting point of PVA very close to its decomposition temperature, which makes the thermoforming process very difficult.

The introduction of tris (77-86-1) changed the molecular structure of PVA, the introduced functional groups interacted with hydroxyl groups in PVA, increased the decomposition temperature, obtained a wide melting processing window, and realized the thermoplastic processing of PVA without adding any plasticizer. The mechanical properties of PVA modified by Tris were improved, the tensile strength decreased and the elongation at break increased.

Tris for composite phase change materials

Phase change material (PCM) is a material that changes its state with temperature and provides latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged before the completion of phase transformation, forming a wide temperature platform, but the latent heat absorbed or released is quite large. PCM can be recycled almost indefinitely, with the advantages of large latent heat, high energy storage density, controllable phase change temperature range and so on. It is the collection and selection of power battery thermal management system.

Tris was filled into porous silica with pore diameter of 15 ~ 100nm and porous glass with pore diameter of 12 ~ 100nm to prepare composite energy storage materials. The morphology and heat storage properties of the composites were characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD) and differential scanning calorimetry (DSC). The space limitation of nano size affects the thermal storage performance of Tris, which significantly improves the phase change temperature, phase change latent heat, undercooling and thermal cycling performance of composite phase change materials.