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    Home > Catalyst and Auxiliary > Polymer (Find 313 items)

    Polymer

    Poly(acrylic acid) Macromolecule

    (9003-01-4)
    Poly(acrylic acid) (PAA or Carbomer) is generic name for synthetic high molecular weight polymers of acrylic acid. They may be homopolymers of acrylic acid, crosslinked with an allyl ether pentaerythritol, allyl ether of sucrose or allyl ether of propylene. In a water solution at neutral pH, PAA is an anionic polymer, i.e. many of the side chains of PAA will lose their protons and acquire a negative charge. This makes PAAs polyelectrolytes, with the ability to absorb and retain water and swell to many times their original volume. Dry PAAs are found in the market as white and fluffy powders. Carbomer codes (910, 934, 940, 941 and 934P) are an indication of molecular weight and the specific components of the polymer. For many applications PAAs are used in form of alkali metal or ammonium salts, e.g. sodium polyacrylate.

    Polyparpylene Fiber

    (9003-07-0)
    Polypropylene (PP), also known as polypropene, is a thermoplastic polymer used in a wide variety of applications including packaging and labeling, textiles (e.g., ropes, thermal underwear and carpets), stationery, plastic parts and reusable containers of various types, laboratory equipment, loudspeakers, automotive components, and polymer banknotes. An addition polymer made from the monomer propylene, it is rugged and unusually resistant to many chemical solvents, bases and acids.Polypropylene has a relatively slippery "low energy surface" that means that many common glues will not form adequate joints. Joining of polypropylene is often done using welding processes.In 2013, the global market for polypropylene was about 55 million metric tons.

    Phenol-Formaldehyde Resin

    (9003-35-4)
    Phenol formaldehyde resins (PF) are synthetic polymers obtained by the reaction of phenol or substituted phenol with formaldehyde. Used as the basis for Bakelite, PFs were the first commercial synthetic resins (plastics). They have been widely used for the production of molded products including billiard balls, laboratory countertops, and as coatings and adhesives. They were at one time the primary material used for the production of circuit boards but have been largely replaced with epoxy resins and fiberglass cloth, as with fire-resistant FR-4 circuit board materials.There are two main production methods. One reacts phenol and formaldehyde directly to produce a thermosetting network polymer, while the other restricts the formaldehyde to produce a prepolymer known as novolac which can be moulded and then cured with the addition of more formaldehyde and heat. There are many variations in both production and input materials that are used to produce a wide variety of resins for special purposes.

    Ethylene-Vinyl Acetate Copolymer

    (24937-78-8)
    Flexible tubing, color concentrates, gaskets and molded parts for autos, plastic lenses and pumps.
    Polymers generally refer to high molecular compounds, which are referred to as macromolecules or macromolecules. They generally refer to compounds with a relative molecular mass of up to several thousand to several million. mixture. According to the source, it can be divided into two categories: natural polymers and synthetic polymers. According to the performance classification, it can be divided into three categories: plastic, rubber and fiber. ""Polymer"" on Echemi mainly supplies raw materials for Polymer.
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