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[×ÊÔ´] ·ÖÏíÓ¢Îİæµç×ÓÊé¡¶Alkylene Oxides and their Polymers¡·
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Alkylene oxides are interesting molecules that are used in a wide variety of ways. They are used in monomeric form as reactive intermediates to prepare low-molecular-weight chemicals that find application as solvents, pharmaceuticals, and surfactants. Ethylene oxide, for example, is used as a sterilant and as an intermediate. The utility of alkylene oxides and their polymers is far-reaching and includes the automotive, pharmaceutical, cosmetic, metal-working, mining, industrial coating, textile, construction, home furnishings, and other industries. The poly(alkylene oxide)s are an unusual family of polymeric materials because of the extremely diverse and critical functions they perform in commercial use. To most consumers, these materials are often hidden in the fine print that describes compositions on labels, in material safety data sheets, and in handling documents. To scientists, the poly(alkylene oxide)s are known as distinct materials that are available in a wide range of molecular weights, from dimer to polymers of tens of millions, and yet remain well-characterized species of controlled molecular-weight distribution and known structure and configuration. These polymers can form ionic or molecular complexes and can provide mixtures with wide ranges of compatibilities, solubilities, ϲ»¶µÄ×Ô¼ºÏÂÔØ£¬±ðÍüÁËÆÀ¼Û |
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