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  2. Polystyrene - Wikipedia

    en.wikipedia.org/wiki/Polystyrene

    Polystyrene foam blows in the wind and floats on water due to its low specific gravity. It can have serious effects on the health of birds and marine animals that swallow significant quantities. [71] Juvenile rainbow trout exposed to polystyrene fragments show toxic effects in the form of substantial histomorphometrical changes. [72]

  3. Chain-growth polymerization - Wikipedia

    en.wikipedia.org/wiki/Chain-growth_polymerization

    In addition, some carbon nanotube polymer is used for electronical devices. Controlled living chain-growth conjugated polymerization will also enable the synthesis of well-defined advanced structures, including block copolymers. Their industrial applications extend to water purification, biomedical devices and sensors. [11]

  4. Phase-out of polystyrene foam - Wikipedia

    en.wikipedia.org/wiki/Phase-out_of_polystyrene_foam

    Animals do not recognize polystyrene foam as an artificial material, may mistake it for food, and show toxic effects after substantial exposure. Full or partial bans of expanded and polystyrene foam commonly target disposable food packaging. Such bans have been enacted through national legislation globally, and also at sub-national or local ...

  5. Styrene maleic anhydride - Wikipedia

    en.wikipedia.org/wiki/Styrene_maleic_anhydride

    In one copolymer, the monomers can be almost perfectly alternating. [1] but (random) copolymerisation with less than 50% maleic anhydride content is also possible. [2] The polymer is formed by a radical polymerization, using an organic peroxide as the initiator. The main characteristics of SMA copolymer are its transparent appearance, high heat ...

  6. Step-growth polymerization - Wikipedia

    en.wikipedia.org/wiki/Step-growth_polymerization

    The easiest way to visualize the mechanism of a step-growth polymerization is a group of people reaching out to hold their hands to form a human chain—each person has two hands (= reactive sites). There also is the possibility to have more than two reactive sites on a monomer: In this case branched polymers production take place.

  7. Styrofoam - Wikipedia

    en.wikipedia.org/wiki/Styrofoam

    Styrofoam insulation extruded polystyrene foam (XPS), owned and manufactured by DuPont. Styrofoam is a genericized trademarked brand of closed-cell extruded polystyrene foam (XPS), manufactured to provide continuous building insulation board used in walls, roofs, and foundations as thermal insulation and as a water barrier.

  8. Divisions on curbing plastic waste persist as UN treaty talks ...

    www.aol.com/news/countries-remain-divided-fifth...

    BUSAN/BAKU (Reuters) -As delegates from 175 countries gathered in Busan, South Korea on Monday for the fifth round of talks aimed at securing an international treaty to curb plastic pollution ...

  9. Graft polymer - Wikipedia

    en.wikipedia.org/wiki/Graft_polymer

    Graft copolymers are a branched copolymer where the components of the side chain are structurally different than that of the main chain. Graft copolymers containing a larger quantity of side chains are capable of wormlike conformation, compact molecular dimension, and notable chain end effects due to their confined and tight fit structures. [1]