ABS plastic heat is not good, how to solve it?

First, why should we improve the heat resistance of ABS plastics ?
ABS has good processability and good toughness, but its heat resistance is not enough, which limits its application range. In general, the ABS Vicat softening point is around 95 ° C, and the heat-resistant ABS (VST/B/50) exceeds 100 ° C. Therefore, it is necessary to increase the heat resistance of ABS to expand its application. Especially in the automotive and electronic and electrical aspects, for automotive interior parts dashboards, toolboxes, ashtrays, new extrusion and other components; automotive exterior components, such as front grille, car base, painted mirror door panel components, wheels The hood, the spoiler, the gearbox cover, etc. all require good heat resistance. In addition, in the electrical and electronic aspects, vacuum cleaner housings, microwave oven door frames, hair dryers, etc. also require ABS materials to have better heat resistance, in order to meet the material requirements of the parts, the specific requirements are as follows:
High stability in high temperature environments;
High impact resistance;
Excellent dimensional stability;
Easy to process;
Unbeatable surface;
Low VOC.
Second, how to improve the heat resistance of ABS plastics?
The heat resistance of plastics is generally defined as the measure of how many characteristics are maintained below ambient temperature in high temperature environments. In general, high-molecular materials change the physical properties of materials because of the increased molecular motion, and the most obvious is elasticity. The most common way to improve the heat resistance of polymer materials is to inhibit molecular motion. Generally there are the following methods:
1. The molecular model of the polymer is framed into a three-dimensional structure to form a mesh, thereby suppressing molecular motion;
2. Add a difficult-to-operate aromatic ring and alicyclic structure to the molecular mechanism;
3. Add a polar group to the polymer to rely on the binding force of the hydroxide chain to inhibit the molecular structure;
4. Introduce a crystal structure into the polymer structure for heat-resistant modification, using a heat-resistant modifier.
In general, ABS heat resistance can be improved by lowering the rubber content, increasing the SAN molecular weight and the acrylonitrile content, but the method of developing heat resistance and ABS by adding a heat resistant monomer or a heat resistant additive has been attracting more and more attention. Therefore, many well-known ABS plastics modification companies use heat-resistant modifiers to improve the heat resistance of ABS.
Three good heat-resistant modifiers should meet these 8 requirements!
At present, in addition to improving the heat resistance of ABS plastics, the problem of automotive VOCs has become more and more important; people hope that the lower the volatile organic solvents in heat-resistant ABS plastics, the better. Therefore, the requirements for heat-resistant modifying auxiliaries have not only stayed in the demand for improving heat resistance, but also have requirements for reducing VOC. Therefore, in the future, the heat-resistant modification additives required by the modified plastics enterprises need to meet the following requirements:
Higher heat resistance (glass transition temperature = 175 ° C);
Better thermal stability;
Better dimensional stability;
Very easy to mix with ABS and SAN;
Improve the surface adhesion of the product;
Low VOC;
High liquidity;
Good processing performance.

Acids exist universally in our life. There are both numerous kinds of natural ACID compounds with biological functions and massive synthesized acids which are used in many ways.

In industry

Acids are fundamental reagents in treating almost all processes in today's industry. In the chemical industry, acids react in neutralization reactions to produce salts. For example, nitric acid reacts with ammonia to produce ammonium nitrate, a fertilizer. Additionally, carboxylic acids can be esterified with alcohols, to produce esters. Acids are often used to remove rust and other corrosion from metals in a process known as pickling. They may be used as an electrolyte in a wet cell battery, such as sulfuric acid in a car battery. 

In food

Many acids can be found in various kinds of food as additives, as they alter their taste and serve as preservatives. Phosphoric acid, for example, is a component of cola drinks. Acetic Acid is used in day-to-day life as vinegar. Citric Acid is used as a preservative in sauces and pickles. Certain acids are used as drugs. Acetylsalicylic acid (Aspirin) is used as a pain killer and for bringing down fevers.

Acid catalysis

Acids are used as catalysts in industrial and organic chemistry; for example, sulfuric acid is used in very large quantities in the alkylation process to produce gasoline. Some acids, such as sulfuric, phosphoric, and hydrochloric acids, also effect dehydration and condensation reactions. In biochemistry, many enzymes employ acid catalysis.

ACID

Ethanedioic Acid,Anhydrous Oxalic Acid,Acetic Acid 98.5%,Acid Industry Grade

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