Analysis of rubber Product Composition-NOA Testing & Certification Group

Analysis of rubber Product Composition

Rubber refers to a highly elastic polymer material with reversible deformation, which is elastic at room temperature, can produce large deformation under the action of a small external force, and can return to its original shape after removing the external force. Rubber is a completely amorphous polymer, its glass transition temperature (T g) is low, and its molecular weight is often large, greater than several hundred thousand.

Rubber is divided into natural rubber and synthetic rubber. Natural rubber is made by extracting colloid from rubber trees, rubber grass and other plants after processing; synthetic rubber is obtained by polymerization of various monomers. Rubber products are made of rubber rubber species as the matrix, and then equipped with other additives (auxiliaries) after a certain process treatment. With its unique structure, plus the characteristics of easy modification and processing, rubber has excellent properties that are incomparable and irreplaceable by other materials.。

The rubber processing process includes basic processes such as plasticizing, mixing, calendering or extrusion, molding and vulcanization. In order to add various required compounding agents to the rubber, the raw rubber needs to be plasticized to improve its plasticity first; then the carbon black and various rubber additives and rubber are uniformly mixed into a rubber compound by mixing; It is made into a certain shape blank; then it is combined with the calendered or glued textile material (or with metal material) to form a semi-finished product; finally, the plastic semi-finished product is made into a highly elastic final product after vulcanization .

Rubber products are widely used in all aspects of industry or life. Stable and reliable performance is the foundation to ensure the normal use of materials. Rubber products are widely used in transportation, industrial minerals, agriculture, forestry and water conservancy, military defense, civil construction, electrical communication, medical and health, culture, education and sports, daily necessities, commodity storage and other industries.

NOA has a central laboratory of 30,000 square meters, with organic laboratory, inorganic laboratory, physical and chemical laboratory, thermal analysis laboratory, mechanics laboratory, reliability laboratory, combustion laboratory, and weather resistance laboratory. It can provide one-stop analysis and testing services for raw material quality control, component analysis, foreign matter analysis, performance testing, and reliability testing for rubber materials.

Service content

We can provide component analysis, formulation analysis, failure analysis, comparative analysis, foreign matter analysis for products through large-scale precision instruments such as spectroscopy, chromatography, nuclear magnetic resonance, and the use of "light-color-heat-quality-element-chemical" multi-analysis methods Analysis and other services, help customers analyze the chemical composition and component content of samples, or qualitatively and quantitatively analyze specified components and content according to customer requirements, identify raw materials, additives, specific components, content and foreign matter components and other analytical services.

1,service product

service product	Service area
rubber raw material	PE rubber, silicone rubber, nitrile rubber, styrene butadiene rubber, butyl rubber, butadiene rubber, natural rubber, etc.
synthetic rubber	Styrene butadiene rubber SBR, butyl rubber IIR, butadiene rubber, isoprene rubber, ethylene propylene rubber EPDM, neoprene, etc.
Special rubber	Nitrile rubber NBR, hydrogenated nitrile rubber HNBR, neoprene CR, chlorine-based rubber, fluorine rubber, chloroether rubber, silicone rubber, etc.
rubber products	Rubber hoses, tires, rubber rollers, seals, rubber belts, rubber sheets, rubber cables, medical rubber, rubber parts, etc.

2,service items

service name	service definition
Composition Analysis	Qualitative and quantitative analysis of components
Material identification	Rubber material identification
Comparative analysis	Qualitative and quantitative analysis of components + description of component differences + suggestions for performance improvement
Foreign body analysis	Foreign body discovery + analysis plan + test results + foreign body composition analysis conclusion
failure analysis	(fracture, crack, precipitation, delamination, leakage) and other failure background questionnaire + analysis plan + test results + failure analysis conclusion
Specified Component Analysis	Compound name and content + test method
Large instrument test	PY-GCMS, TGA, DSC, NMR spectrum test
Raw material quality control	Raw material purity test, material qualitative analysis, qualitative and quantitative analysis of specified components

Service process

Q&A

1.In the application process of rubber soles, we often encounter the following problems: the soles are in the process of production and storage, and the surface is "frosted", and the soles are easy to crack and break during use. Wondering how to fix this situation?

First, you can sample the "cream" components, use Fourier transform infrared (FTIR) and gas-mass spectrometry (GC-MS) to characterize small molecules, and then analyze the composition, mechanical properties and weather resistance of the rubber. The aging performance is tested, and the final adjustment plan improves the solubility of the rubber compound to the additives and solves the problem of product quality.

2.I have a model of rubber goggles and would like to know if the product contains natural rubber?

Through Fourier transform infrared spectrometer (FTIR) and pyrolysis gas chromatography-mass spectrometer (PGC-MS) instrument analysis, the components of rubber seeds in the product are analyzed. If it is determined to be polyisoprene, the sample is further extracted and tested. The content of water-soluble protein in the sample. If the main material is polyisoprene and the sample contains water-soluble protein, it can be considered to contain natural rubber components.

3.The valve manufacturer uses a rubber gasket. Considering the high cost, I want to purchase products of the same material. I want to know what kind of rubber the gasket is?

Through NOA large-scale instrument analysis method, the specific rubber composition of the rubber used can be confirmed, and the rubber gasket material is fluorine rubber through analysis.。

4.What are the common classifications of rubber?

According to the appearance of rubber: rubber can be divided into four categories: solid rubber (also known as dry rubber), milky rubber (referred to as latex), liquid rubber and powder rubber. According to the properties and uses of rubber: in addition to natural rubber, synthetic rubber can be divided into general synthetic rubber, semi-universal synthetic rubber, special synthetic rubber and special synthetic rubber. According to the physical form of rubber: rubber can be divided into hard rubber and soft rubber, raw rubber and mixed rubber. According to performance and use: general rubber and special rubber.

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From pre-design to post-operation, NOA has the ability to guarantee the whole life cycle of the business. NOA, as an independent third-party inspection company, has a large number of domestic and international standards and specifications proficient in design, welding, non-destructive testing, painting, packaging and other fields The experienced team of professional engineers and inspection experts, with more than ten years of experience in the domestic market, is familiar with all aspects of the domestic industrial equipment supply chain, and can provide you with technical support services for the full life cycle of technical services in a timely manner, combining various products. Inspection, certification, testing, consulting, and auditing services can provide you with one-stop all-round comprehensive services.

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NOA has formed a mature and solid operation system in the development of more than 20 years. We let technical experts who are familiar with market regulations and testing standards and have professional industry experience to carry out inspection, evaluation and design review work. While meeting the requirements of domestic and international standards, we ensure that customers can obtain satisfactory service results in the first time with accurate time-sensitive management methods, and ensure that customers can seize the opportunity in the market competition.

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