• synthetic
  • Many naturally occurring and some synthetic polymers are produced by step-growth polymerization, e.g. polyesters, polyamides, polyurethanes, etc. (wikipedia.org)
  • The pioneer of synthetic polymer science, Wallace H. Carothers, developed a new means of making polyesters through step-growth polymerization in 1930s as a research group leader at DuPont. (wikipedia.org)
  • molecules
  • Mono- and bismaleimide-based polymers are used for high temperature applications up to 250 °C. Maleimides linked to rubber chains are often used as flexible linking molecules to reinforce the rubber (tire). (wikipedia.org)
  • citation needed] PEGylation is the process of attaching the strands of the polymer PEG to molecules, most typically peptides, proteins, and antibody fragments, that can improve the safety and efficiency of many therapeutics. (wikipedia.org)
  • It was the first reaction designed and carried out with the specific purpose of creating high molecular weight polymer molecules, as well as the first polymerization reaction whose results had been predicted beforehand by scientific theory. (wikipedia.org)
  • Since phenolphthalein molecules are surrounded by the polymers and thus left on the surface even after another rinse, the test strip turns red when a base is added. (wikipedia.org)
  • carbon
  • wherein L is the point of bonding to the terminal carbon of the second terminus of the polymer backbone, said first functional group being different from said N-maleimidyl moiety bonded to the terminal carbon of said second terminus. (google.com)
  • oligomers
  • Step-growth polymerization refers to a type of polymerization mechanism in which bi-functional or multifunctional monomers react to form first dimers, then trimers, longer oligomers and eventually long chain polymers. (wikipedia.org)
  • residues
  • Due to exceptionally fast reaction rates and significantly high selectivity towards cysteine residues in proteins, a large variety of maleimide heterobifunctional reagents are used for the preparation of targeted therapeutics, assemblies for studying proteins in their biological context, protein-based microarrays, or proteins immobilisation. (wikipedia.org)
  • amino groups
  • Moreover, since most proteins possess several available/accessible amino groups, the polymer conjugates formed are typically mixtures of mono-pegylated, di-pegylated, tri-pegylated species and so on, which can be difficult and also time-consuming to characterize and separate. (allindianpatents.com)
  • DETAILED DESCRIPTION OF THE INVENTION The prior art has found that when a dimaleimide is reacted with a polyamine having two or more primary amino groups, the resultant polymer exhibits improved characteristics as compared to the polymer which results from heating and reacting dimaleimide alone. (google.com.au)
  • proteins
  • After considerable study, he concluded that the attachment of an inert and hydrophilic polymer might extend blood life and control immunogenicity of the proteins. (wikipedia.org)
  • resins
  • The were first used after World War II, and continuing research has led to an increased range of thermoset resins, polymers or plastics, as well as engineering grade thermoplastics, all developed for use in the manufacture of polymer composites with enhanced and longer-term service capabilities. (wikipedia.org)
  • The foremost types of thermosetting polymers used in structural composites are benzoxazine resins, bis-Maleimide resins (BMI), cyanate ester resins, epoxy (epoxide) resins, phenolic (PF) resins, unsaturated polyester (UP) resins, polyimides, polyurethane (PUR) resins, silicones, and vinyl esters. (wikipedia.org)
  • temperature
  • Thermosensitive polymers are a class of "smart" materials that have the ability to respond to a change in temperature. (specificpolymers.fr)
  • At temperatures below the melt temperature of the polymer, the polymer is substantially impermeable to the agent. (google.com)
  • At tempertures at or above the melt temperature the polymer is substantially permeable to the agent. (google.com)
  • Classes of step-growth polymers are: Polyester has high glass transition temperature Tg and high melting point Tm, good mechanical properties to about 175 °C, good resistance to solvent and chemicals. (wikipedia.org)
  • reactions
  • A special feature of the reactivity of maleimides is their susceptibility to additions across the double bond either by Michael additions or via Diels-Alder reactions. (wikipedia.org)
  • possess
  • There are alternative precursors to arrive at the parylene polymers, which possess leaving groups, the most popular using bromine to yield the parylene AF-4 polymer. (wikipedia.org)
  • occurs
  • Plasticity is the general property of all materials which can deform irreversibly without breaking but, in the class of moldable polymers, this occurs to such a degree that their actual name derives from this specific ability. (wikipedia.org)
  • lesser
  • Parylene C and to a lesser extent AF-4, SF, HT (all the same polymer) are used for coating printed circuit boards (PCBs) and medical devices. (wikipedia.org)
  • form
  • In reality, however, the "pendant units" are usually "hung" as part of the monomers, before the monomers themselves are linked together to form the polymer chain. (wikipedia.org)
  • natural
  • Only a handful of natural maleimides - exemplified by the cytotoxic showdomycin from Streptomyces showdoensis, and pencolide from Pe. (wikipedia.org)
  • types
  • Although the most common types of self-healing materials are polymers or elastomers, self-healing covers all classes of materials, including metals, ceramics, and cementitious materials. (wikipedia.org)
  • Field
  • In 1975 he did a post-doctorate at the University of Arizona, in Tucson, AZ, United States, with professor H. K. Hall, Jr., in the field of organic polymers. (wikipedia.org)