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  2. Polybutylene terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polybutylene_terephthalate

    PBT and PET are sensitive to hot water above 60 °C (140 °F). PBT and PET need UV protection if used outdoors, and most grades of these polyesters are flammable, although additives can be used to improve both UV and flammability properties. PBT is produced by the polymerization of 1,4-butanediol and terephthalic acid. [4] [5]

  3. Crystallization of polymers - Wikipedia

    en.wikipedia.org/wiki/Crystallization_of_polymers

    Crystallization of polymers is a process associated with partial alignment of their molecular chains. These chains fold together and form ordered regions called lamellae, which compose larger spheroidal structures named spherulites.

  4. Reversible addition−fragmentation chain-transfer polymerization

    en.wikipedia.org/wiki/Reversible_addition%E2%88...

    RAFT polymerization has been used to synthesize a wide range of polymers with controlled molecular weight and low polydispersities (between 1.05 and 1.4 for many monomers). RAFT polymerization is known for its compatibility with a wide range of monomers as compared to other controlled radical polymerizations.

  5. Polymerization - Wikipedia

    en.wikipedia.org/wiki/Polymerization

    In polymer chemistry, polymerization (American English), or polymerisation (British English), is a process of reacting monomer molecules together in a chemical reaction to form polymer chains or three-dimensional networks. [1] [2] [3] There are many forms of polymerization [4] and different systems exist to categorize them. IUPAC definition for ...

  6. Chain transfer - Wikipedia

    en.wikipedia.org/wiki/Chain_transfer

    In polymer chemistry, chain transfer is a polymerization reaction by which the activity of a growing polymer chain is transferred to another molecule: [1] [2] + + where • is the active center, P is the initial polymer chain, X is the end group, and R is the substituent to which the active center is transferred.

  7. Polybutylene adipate terephthalate - Wikipedia

    en.wikipedia.org/wiki/Polybutylene_adipate_tere...

    PBAT (short for polybutylene adipate terephthalate) is a biodegradable random copolymer, specifically a copolyester of adipic acid, 1,4-butanediol and terephthalic acid.PBAT is produced by many different manufacturers and may be known by the brand names ecoflex, Wango, Ecoworld, Eastar Bio, and Origo-Bi.

  8. Polymer architecture - Wikipedia

    en.wikipedia.org/wiki/Polymer_architecture

    Complex architecture polymers can be synthesized either with the use of specially tailored starting compounds or by first synthesising linear chains which undergo further reactions to become connected together. Knotted polymers consist of multiple intramolecular cyclization units within a single polymer chain.

  9. Chain walking - Wikipedia

    en.wikipedia.org/wiki/Chain_walking

    Structure of polymers obtained in CW polymerization of ethene vs. higher olefins. CW occurs after the polymer chain has grown somewhat on the metal catalyst. The precursor is a 16 e − complex with the general formula [ML 2 (C 2 H 4)(chain)] +. The ethylene ligand (the monomer) dissociates to produce a highly unsaturated 14 e − cation.