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联系我们公司主营业务为高硬脆材料切割设备、切割耗材的研发、生产、销售及其配套服务。基于自主核心技术，公司主要面向光伏行业生产厂商提供硅棒至硅片“截断、开方、磨抛、切片”环节的系统解决方案。光伏行业全球前十名硅片制造企业均为公司客户。 -
联系我们公司主营业务为高硬脆材料切割设备、切割耗材的研发、生产、销售及其配套服务。基于自主核心技术，公司主要面向光伏行业生产厂商提供硅棒至硅片“截断、开方、磨抛、切片”环节的系统解决方案。光伏行业全球前十名硅片制造企业均为公司客户。
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20
2023
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06
Introduction of special rubber materials-chlorosulfonated polyethylene rubber (CSM)
Chlorosulfonated polyethylene (alias: Haibolong Haibolong hypalon) is a kind of special rubber made by chlorination and chlorosulfonation of polyethylene. After chlorination and sulfonation of polyethylene, the regularity of its structure is destroyed, and it becomes soft and elastic chlorosulfonated polyethylene rubber at room temperature.
Chlorosulfonated polyethylene (alias: Haibolong Haibolong hypalon) is a kind of special rubber made by chlorination and chlorosulfonation of polyethylene. After chlorination and sulfonation of polyethylene, the regularity of its structure is destroyed, and it becomes soft and elastic chlorosulfonated polyethylene rubber at room temperature.
Chlorosulfonated polyethylene is polyethylene dissolved in carbon tetrachloride, tetrachloroethylene or hexachloroacetylene, with azobisisobutyronitrile as catalyst or under ultraviolet light irradiation, through the mixture of chlorine and sulfur dioxide or treated with sulfinyl chloride SO2CI. The brief structure is as follows:
The properties of chlorosulfonated polyethylene rubber depend on the molecular weight of the raw material polyethylene and the relative content of chlorine and sulfur. Among them, the molecular weight of polyethylene has a great influence on the properties of chlorosulfonated polyethylene: the molecular weight is too low, the viscosity of the finished product is large, and the tensile strength is low; its physical and mechanical properties increase with the increase of the molecular weight of polyethylene, but after increasing to a certain limit, The effect on its performance is not obvious. Generally used polyethylene molecular weight again 2w ~ 10w. Among them, chlorosulfonated polyethylene 20 and 30 are high-pressure polyethylene with low molecular weight of 2w ~ 4w; chlorosulfonated polyethylene 40 and 45 are commonly used low-pressure polyethylene with molecular weight of 8w ~ 10w.
The introduction of chlorine atoms into the polyethylene molecular chain can eliminate the crystallinity of the molecule while maintaining the excellent properties of polyethylene, and the resulting elastomer is soft and easy to process. The hardness and strength of the polymer with chlorine content of 25% ~ 38% are the smallest, and the hardness and strength of the polymer will be improved by increasing the chlorine content. Tests have shown that the optimum chlorine content is about 27%. When the chlorine content is higher, the resulting polymer has better solvent resistance, oil resistance, and higher strength at higher temperatures, but the compression set and brittleness at low temperatures increase. When the chlorine content is 27% to 30%, the polymer has sufficient plasticity and good processability.
The role of sulfur dioxide is to combine it with chlorine to form a sulfinyl chloride group in the chlorosulfonated polyethylene, so as to form a cross-linking bond by means of this group. Therefore, its content has a great influence on the vulcanization performance of the rubber compound. If the content is too high, it is easy to burn. If the sulfur content in the group is calculated, 1.5% is generally appropriate.
Chlorosulfonated polyethylene is white or Milky White flake or granular solid, relative density 1.07~1.28. Its solubility parameter δ = 8.9, soluble in aromatic hydrocarbons and chlorinated hydrocarbons; low solubility in ketones, esters, cyclic ethers; insoluble in acids, aliphatic hydrocarbons, monohydric alcohols and glycols. When chlorosulfonated polyethylene rubber is continuously heated at 121 ℃ and above for several hours, the sulfinyl chloride group will be cracked, which will increase the viscosity of the polymer and its dissolution, and it is easy to produce early vulcanization during processing.
Why carbon black and coke are not adsorptive
Carbon black and coke are carbon materials, but their adsorption properties are very different. Carbon black has strong adsorption and can be used to prepare various adsorbents, while coke has almost no adsorption. Why is this?
2023-06-14
The "ground refinery" has faded from the spotlight, and how to recycle waste tires with low consumption and harmlessness has attracted much attention. On the other hand, the state recently added waste tires, waste rubber products production of recycled oil, cracking carbon black tax rebate, but also further stimulate the enthusiasm of industrial capital entry.
2023-06-14
Application and Development Trend of Thermal Conductive Absorbing Materials
With the development of electronic technology, the new generation of electronic components from consumer electronics such as mobile phones and tablet computers to RFFE/antenna modules for 5G communication, MIMO, wifi6, radar and optical modules for optical communication have higher data transmission rate, higher power density and higher transmission frequency band, and require electronic equipment to have more functional modules while maintaining the existing volume or even reducing the volume, the electronic equipment will generate a large amount of waste heat when working.
2023-06-20
Introduction of special rubber materials-chlorosulfonated polyethylene rubber (CSM)
Chlorosulfonated polyethylene (alias: Haibolong Haibolong hypalon) is a kind of special rubber made by chlorination and chlorosulfonation of polyethylene. After chlorination and sulfonation of polyethylene, the regularity of its structure is destroyed, and it becomes soft and elastic chlorosulfonated polyethylene rubber at room temperature.
2023-06-20
Ultra-high thermal conductivity, ultra-flexible thermal conductive gasket
Ultra-high thermal conductivity, ultra-flexible thermal gasket is a thermal conductivity greater than 12 W/m · K, and both excellent flexibility series products, as shown in Table 1. This series of products is to solve the problem of heat dissipation between high heat flux and highly integrated electronic equipment heating devices and heat sinks.
2023-06-20
Qingdao Flywheel Xingbang New Material Technology Co., Ltd. is a high-tech enterprise integrating R & D, production, trade and service. It is committed to the R & D and innovation of carbon nanomaterials products.
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