摘要:
In one aspect, amphiphilic block copolymers are described herein comprising a first block and a second block, the second block including monomer having a side chain comprising a heteroaryl moiety, wherein the second block is more hydrophobic than the first block. In some embodiments, the heteroaryl moiety is a five-membered ring or six membered ring. Amphiphilic block copolymers described herein, in some embodiments, can be used to form micellar compositions for solubilizing and delivering water insoluble pharmaceutical and/or therapeutic agents.
摘要:
The present disclosure provides thermoreversible polymers, hydrogel compositions comprising the thermoreversible polymers, as well as methods of making and using the thermoreversible polymers.
摘要:
This invention relates to end-functionalized living polymers or copolymers having a structure represented by the general formula 1 or 2, wherein R1 is a hydrogen atom, a methyl group, or a radically non-polymerizable organic group containing 1 to 20 carbon atoms. R2 is a functional end group of a vinyl hetero monomer selected from the group consisting of hydroxy, epoxy, silyl, NH2, NH(C1-C6alkyl), N(C1-C6alkyl)2, —CH═CH2, —C≡CH, —C(CH3)═CH2, —O—CH═CH2, (—O—CH2—CH2)1-10—OH, —OR20, —COOR20, —CONHR20, —OCONHR20, —OCOR20 and —NH—CO—R20, wherein R20 is linear or branched C1-C20 alkyl or linear or branched C1-C20 alkyl substituted with hydroxy, epoxy, silyl, NH2 or N(C1-C6alkyl)2; or R20 is phenyl, benzyl, —CH═CH2, —C≡CH or —C(CH3)═CH2, or R2 is a residue of an acrylic acid (CH2═CH—COO—*), methacrylic acid, (CH2═C(CH3)—COO—*) or CH(CH3)═CH—COO—* or R2 is a residue of a dicarboxylic acid HOOC—Rc—COO—* or C1-C6alkyl-OOC—Rc—COO—* wherein Rc is C1-C20 alkylene, C1-C20alkenylene or phenylene; or R2 is a residue derived from the reaction of an isocyanate Ra—NCO with the hydroxy group or with the amine group of the vinyl hetero monomer, said residue being Ra—NHCOO—* or Ra—NHCO—NH—* wherein Ra is unsubstituted C1-C20alkyl, C1-C20cycloalkyl or C1-C20alkyl substituted with hydroxy, epoxy, silyl, NH2, NH(C1-C6alkyl) or N(C1-C6alkyl)2; or R2 is a residue derived from the reaction of a diisocyanate residue OCN—Rb—NCO with the hydroxy group or with the amine group of the vinyl hetero monomer, said residue being *—OOC—NH—Rb—NCO or *—HNOC—NH—Rb—NCO or *—OOC—NH—Rb—NHCOR30 wherein Rb is C1-C20 alkylene or C1-C20cycloalkylene or phenylene and R30 is a residue of hydroxyethylacrylate (CH2═CH—COO—(CH2)2—O*), hydroxyethylmethacrylate (CH2═C(CH3)—COO—(CH2)2—O*), hydroxybutylacrylate (CH2═CH—COO—(CH2)4—O*) or hydroxybutylmethacrylate (CH2═C(CH3)—COO—(CH2)4—O*), A is the hetero atom of the vinyl hetero monomer selected from the group consisting of oxygen, nitrogen, sulfur and silicon; and if R2 is silyl and M is a direct bond, A is a direct bond; M is a bond or a divalent group linking the heteroatom of the vinyl hetero monomer and the functional end group of the vinyl hetero monomer said M being selected from the group consisting of C1-50 alkylene, C1-50 (hetero)alkylene, arylene and heteroarylene; X is a halogen atom, a nitroxide group or a sulphide group, Zn is a polymer or copolymer segment of random-, gradient- or block-type structure, which is built up from vinylic monomers selected from the group consisting of isoprene, 1,3-butadiene, α-C5-18alkene, 4-vinyl-pyridine, 2-vinyl-pyridine, vinyl-imidazole, N-vinylpyrrolidone, dimethylacrylamide, 3-dimethylamino-propylmethacrylamide, styrene, substituted styrene and a compound of formula CH2═C(R3)—C(═R4)—R5, wherein R3 is a hydrogen atom or a methyl group, R4 is oxygen atom or sulfur atom; R5 is NH2, hydroxy, unsubstituted C1-18 alkoxy, C2-100alkoxy interrupted by at least one N and/or O atom, hydroxy-substituted C1-18alkoxy, unsubstituted C1-18alkylamino, di(C1-18alkyl)amino, hydroxy-substituted C1-18alkylamino, hydroxy-substituted di(C1-18alkyl)amino or —O—CH2—CH2—N(CH3)2; Y is the chain terminus of the polymer/copolymer Zn and Y represents the fragment of a polymerization initiator capable of initiating polymerization; Y1 represents a di-, tri- or polyvalent fragment of a di-, tri-, or polyfunctional NMP initiator; m is 2, 3 or 4, preferably 2; n is the number of monomer units Z and is between 10 and 5000.
摘要:
Disclosed is a curable resin composition that includes radical polymerizable monomers including a monofunctional radical polymerizable monomer, a linear or branched polymer containing a polyoxyalkylene chain, and a radical polymerization initiator.
摘要:
The invention relates generally to polymers and copolymers comprising N-vinylamide-type monomers, their preparation, and compositions, such as electrophoresis separation media, containing the same; to supports, such as capillaries, containing these polymers; and methods for separating a mixture of biomolecules, especially polynucleotides, using capillary electrophoresis. Separation media comprising such polymers yield advantageous performance in the analysis and separation of biomolecules by capillary electrophoresis.
摘要:
The invention relates generally to polymers and copolymers comprising N-vinylamide-type monomers, their preparation, and compositions, such as electrophoresis separation media, containing the same; to supports, such as capillaries, containing these polymers; and methods for separating a mixture of biomolecules, especially polynucleotides, using capillary electrophoresis. Separation media comprising such polymers yield advantageous performance in the analysis and separation of biomolecules by capillary electrophoresis.
摘要:
A radiation-sensitive composition includes a photoacid generator shown by a general formula (0-1a). Each of R0 individually represents a substituted or unsubstituted organic group which includes a carbon atom, a hydrogen atom, and an oxygen atom, and which includes at least one ester bond, and M+ represents a monovalent onium cation. A compound is shown by a general formula (0). R represents a substituted or unsubstituted organic group which includes a carbon atom, a hydrogen atom, and an oxygen atom, and which includes at least one ester bond, and M+ represents a monovalent onium cation.
摘要翻译:辐射敏感性组合物包括通式(0-1a)所示的光致酸产生剂。 R 0各自独立地表示取代或未取代的包含碳原子,氢原子和氧原子的有机基团,其包含至少一个酯键,M +表示一价鎓阳离子。 化合物由通式(0)表示。 R表示取代或未取代的包含碳原子,氢原子和氧原子的有机基团,其包含至少一个酯键,M +表示一价鎓阳离子。
摘要:
A variety of graft copolymers can be formed sodium poly(aspartate) with a wide variety of monomers in an aqueous medium by the use of grafting method in the presence of radical initiator at a temperature of from about five degrees Centigrade to about 100 degrees Centigrade. Graft copolymers at high conversion with molecular weight up to millions can be prepared using this method.
摘要:
A grafted polymer and its use in polymer/liquid crystal composite films, and more particularly in PDLC films, is disclosed. The grafted polymer includes (alkyl)acrylic acid or (alkyl)acrylamide moieties. At least one of the moieties is grafted with an alkylphenol or with an alkoxylated alkylphenol.