摘要:
A class of catalysts with unusually high activity for polymerizing vinyl monomers such as acrylates, methacrylates and styrene is described. The catalysts consists of a metal halide such as CuBr and FeBr2 ligated with multidentate amine-based ligands, for example N,N,N′,N′-tetra[(2-pyridal)methyl]ethylenediamine, and additives. The additives, which are tertiary amine compounds, can greatly increase the catalytic activity. The complex is capable of catalyzing a living polymerization reaction at a concentration of the complex below about 0.1 mol %.
摘要:
A class of catalysts with unusually high activity for polymerizing vinyl monomers such as acrylates, methacrylates and styrene is described. The catalysts consists of a metal halide such as CuBr and FeBr2 ligated with multidentate amine-based ligands, for example N,N,N′,N′-tetra[(2-pyridal)methyl]ethylenediamine, and additives. The additives, which are tertiary amine compounds, can greatly increase the catalytic activity. The complex is capable of catalyzing a living polymerization reaction at a concentration of the complex below about 0.1 mol %.
摘要翻译:描述了一类用于聚合乙烯基单体如丙烯酸酯,甲基丙烯酸酯和苯乙烯的异常高活性的催化剂。 催化剂由诸如N,N,N',N'-四[(2-吡啶基)甲基]乙二胺与多齿胺类配体连接的金属卤化物如CuBr和FeBr 2 N 2结合。 ,和添加剂。 作为叔胺化合物的添加剂可以大大提高催化活性。 络合物能够催化在低于约0.1mol%的络合物浓度下的活性聚合反应。
摘要:
Curcumin, a polyphenol extracted from the rhizome turmeric, has been polymerized to produce a polymer material having a backbone of one or more repeating structural units, at least one of which comprises a curcumin monomer residue. These curcumin-containing polymers have a wide range of pharmacological activities, including, among others antitumor, antioxidant, antiinflammatory, antithrombotic and antibacterial activities. Certain species of these polymers have exhibited remarkable antitumor activity. Water-soluble curcumin derivatives and their use as prodrugs and prodrug carriers are also disclosed.
摘要:
Polymerizable ionic liquid monomers and their corresponding polymers (poly(ionic liquid)s) are created and found to exhibit high absorption of radio frequency electromagnetic radiation, particularly in the microwave and radar bands. These materials are useful for coating objects to make them less reflective of radio frequency radiation and for making objects that absorb radio frequency radiation and are of minimal reflectivity to radio frequency radiation. Free-radical and condensation polymerization approaches are used in the preparation of the poly(ionic liquids).
摘要:
Disclosed are new, highly active and versatile atom transfer radical polymerization (ATRP) catalysts. These catalysts catalyze ATRP for acrylates, methacrylates, and styrenes at surprisingly low concentrations. These catalysts mediated ATRP at a catalyst/initiator molar ratio at 0.005 and produced polymers with well-controlled molecular weights and low polydispersities. ATRP occurred even at a catalyst/initiator molar ratio as low as 0.001 with metal concentration in the produced polymers as low as 6-8 ppm. Amine-containing compounds, such as triethylamine, can significantly increase the catalyst activity of theses catalysts. The amine compounds can also used to the terminal halogen groups such as Br and Cl in the polymers prepared by ATRP.
摘要:
Polymerizable ionic liquid monomers and their corresponding polymers (poly(ionic liquid)s) are created and found to exhibit high absorption of radio frequency electromagnetic radiation, particularly in the microwave and radar bands. These materials are useful for coating objects to make them less reflective of radio frequency radiation and for making objects that absorb radio frequency radiation and are of minimal reflectivity to radio frequency radiation. Free-radical and condensation polymerization approaches are used in the preparation of the poly(ionic liquids).
摘要:
The invention discloses a novel application of fibrinogen-420 and its active domain (alpha EC domain), and a separate alpha EC domain protein has the same or similar function with fibrinogen-420. Fibrinogen-420 and its active domain can be widely used in inhibiting protein aggregation, helping protein refolding, drugs which can prevent and/or treat protein conformation disease, detecting denatured protein in quality control and protect protein from denaturation.
摘要:
The present invention provides to an organo-bridged ladderlike polysiloxane having the following formula: and a tube-like organosilicon polymer, complexes thereof and the method for producing the same.