Free volume theory is developed from crystalline, glassy and liquid nature, it requires a lot of data projections confirm its reliability. Free volume elastomers are mainly influenced by three factors, namely mobile and mobile backbone chain ends moving, side chains, and these in turn move the following factors, namely: 1. Wetting, adsorption 2. The surface is dissolved or mixed surface
The main component of organic silicon defoamer is called silicon oil silicone component, silicone oil at room temperature is not volatile oily liquid, in water, animal and vegetable oils and mineral oil insoluble, or solubility is very small, both ability to high temperature, and low temperature. Chemical inertia, stable physical properties, no biological activity. Organic silicone defoamer is a white viscous emulsion.
Rubber additives in the storage and use of the process often appear sticky, harden crisp or crack and other aging phenomenon, causing this problem, mainly in the following categories: 1. Oxygen: Oxygen will react with the rubber molecules in the rubber additives to cause the molecular chain to break or over-crosslink, so that its performance changes. 2. Thermal: The temperature
The global automobile industry has been steadily launched, driving the consumption of rubber chemicals. The output of China’s rubber chemicals accounts for more than 70% of the world’s total, environmental protection tightens, supply is shortened, and prices rise substantially in 2017, and it is estimated that it will be stable in 2018. Let’s take a closer look at the results
Rubber chemicals are dangerous goods, flammable and explosive. Such as curing agent, oil, carbon black, organic accelerator and antioxidant.
At the National Rubber Industry Information Conference which held in Chengdu, Sichuan Province, November 14-16, 2017,the rubber industry is most concerned about the prices of these two raw materials (rubber chemicals and carbon black)! To this end, the authoritative rubber additives industry also analyzed the price of additives and predict: ● The main reason for price increases this year First,
Common high-temperature cable will be wrapped with a layer of “rubber protective layer”, when such a protective layer is damaged, the high-temperature cable inside will be damaged, so can not continue to use, so manufacturers will peripheral rubber protective layer anti-aging Processing, this process involves the antioxidant. The first point: Because of the different characteristics of each antioxidant, and different
Wire and cable will be subject to heat, oxygen, mechanical stress, light, high energy radiation and other factors in the usage, gradually aging, resulting in reduced product insulation properties. In order to extend the service life of wire and cable, cable manufacturers often use rubber antioxidant, but the protective effect of each antioxidant have limitations, and wire and cable and
The analysis of rubber chemicals in rubber products has important practical significance.As the rubber products added more types of additives, large differences in the amount of addition, part of the assists have reacts, so the full analysis of rubber additives is a There is a higher degree of difficulty.Through medium pressure chromatography, infrared spectroscopy qualitative method, identification of ethylene-propylene rubber
On October 18th, the new party congress was opened at the Great Hall of the People in Beijing. Before the meeting, the press spokesman for the conference briefed the media on the preparation of the meeting and the questions and answered questions. When talking about “one belt,one road”, the spokesman said that the “one belt,one road” initiative has always adhered
