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    Home > Coatings News > Paints and Coatings Market > Coating knowledge: overview of polymer

    Coating knowledge: overview of polymer

    • Last Update: 2020-04-03
    • Source: Internet
    • Author: User
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    Core tip: usually the relative molecular weight of low molecular is less than 1000, while the relative molecular weight of high molecular is more than 5000 Therefore, the high relative molecular weight is the characteristic of polymer compound, the most fundamental difference between polymer and low molecule, and also the basic reason why polymer has various unique properties, such as small proportion, high strength, high elasticity and plasticity As for whether a substance with a relative molecular weight between 1000 and 5000 is a low molecular weight or a high molecular weight depends on its physical and mechanical properties Generally speaking, polymer compounds have better strength and elasticity Low molecular compounds do not, that is to say Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: usually the relative molecular weight of low molecular weight is less than 1000, while the relative molecular weight of high molecular weight is more than 5000 Therefore, the high relative molecular weight is the characteristic of polymer compound, the most fundamental difference between polymer and low molecule, and also the basic reason why polymer has various unique properties, such as small proportion, high strength, high elasticity and plasticity As for whether a substance with a relative molecular weight between 1000 and 5000 is a low molecular weight or a high molecular weight depends on its physical and mechanical properties Generally speaking, polymer compounds have better strength and elasticity However, low molecular compounds do not exist, that is to say, only when their relative molecular mass reaches the physical and mechanical properties, can they be called high molecular compounds Although the relative molecular weight of polymer is very large, its chemical composition is generally relatively simple, and it is often composed of many same chain links by repeated covalent bond For example, PVC is polymerized from many vinyl chloride molecules: low molecular compounds such as vinyl chloride that polymerize into high molecular compounds are called monomers The repeated structural units (such as - CH2 - ChCI -) that make up the polymer chain are called chain links The number of links n is called the degree of polymerization Therefore, the relative molecular weight of polymer = degree of polymerization × chain link weight It should be pointed out that at present, the technology of polymer synthesis is not as strict and precise as that of protein synthesis in vivo, which has certain order, structure and relative molecular weight Therefore, the polymerization degree of synthesized polymer chain is always different, that is to say, the relative molecular weight of each molecule in the same synthetic polymer compound is always different (of course, Synthetic proteins such as insulin are the exception) Therefore, the synthetic polymer is actually a homologous mixture with different molecular weight When we talk about the relative molecular mass of polymer compounds, we mean the average relative molecular mass, and the degree of polymerization is also the average degree of polymerization The phenomenon of different molecular weight in polymer synthesis is called polydispersity of polymer This phenomenon does not exist in low molecules, but it has a great impact on the performance of polymer compounds Generally speaking, the greater the dispersion, the worse the performance The relative molecular weight and dispersity are both problems that must be controlled in the synthesis of polymers Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,
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