Embodiments are directed to a method of making an olefin-based polymer by free-radical polymerization in a reactor system. The method includes initiating a free-radical polymerization of an olefin-based monomer, propagating growth of the olefin-based polymer during continued free-radical polymerization of the olefin-based monomer, and adding to the reactor system a chain transfer agent that terminates the growth of the olefin-based polymer. The chain transfer agent includes a silane. Examples of suitable silanes are: triethylsilane, diethylmethylsilane, tris(trimethylsilyl)silane, n-butylsilane, dimethylphenylsilane, phenylsilane, chlorodimethylsilane, diisopropylaminosilane, 1,2-bis(dimethylsilyl) benzene, 1,3-bis(dimethylsilyl) benzene, 1,4-bis(dimethylsilyl)benzene, 1,1, 3,3-tetramethyldisiloxane, trimethylsilane, (trimethylsilyl)dimethylsilane, and bis(trimethylsilyl)methylsilane.

The invention relates to a novel type of sacrificial polymer or support material for 3D printing, comprising a block copolymer consisting of: at least one partially or totally hydrophilic elastomeric block, with a Tg of less than 30° C. and comprising at least one hydrophilic monomer, and at least one water-soluble thermoplastic block with a Tg of greater than 30° C. and comprising at least one monomer bearing a carboxyl group, said copolymer being extrudable and granulable, said copolymer being partially or totally soluble in water or in aqueous medium, and the mass proportion of the thermoplastic block being greater than 50% of the weight of said copolymer.

The invention relates to the field of block copolymers, particularly to the field of water-soluble or water-dispersible copolymers consisting of two blocks, of which the major block is a hydrophilic thermoplastic block. More particularly, the invention relates to a block copolymer consisting of a partially or totally hydrophilic elastomeric block, with a Tg of less than 30° C. and comprising at least one hydrophilic monomer, and a water-soluble thermoplastic block with a Tg of greater than 30° C. and comprising at least one monomer bearing a carboxyl group, said copolymer being partially or totally soluble in water or in aqueous medium, and the mass proportion of the thermoplastic block being greater than 50% of the weight of said copolymer.

A compound includes a polymer associated with a biological agent. The polymer has a first (meth)acryl monomeric unit with a cationic functional group R1 and a second (meth)acryl monomeric unit with a neutral hydrophilic functional group R2. The cationic functional group R1 is chosen from amino groups and alkylamino groups, and the neutral functional group R2 is chosen from polyethylene glycol (PEG), hydroxyl (OH), phosphorylcholine (PC), and mixtures and combinations thereof.

A supramolecular star-shaped polymer with β-CD as a core and a preparation method thereof. The supramolecular star-shaped polymer with β-CD as a core has a β-cyclodextrin-modified branched monomer F-β-CD that serves as a core and is grafted with acrylamide, acrylic acid, hydrophobic monomers and surface-active macromolecular monomers to form a supramolecular star-shaped polymer. The hydrophobic monomer is one or more of N-benzyl-N alkyl (meth) acrylamide and N-phenethyl-N alkyl (meth) acrylamide; the surface-active macromolecular monomer is one or more of allyl polyoxyethylene ether, alkylphenol polyoxyethylene ether (meth)acrylate, allyl alkylphenol polyoxyethylene ether, alkyl alcohol polyoxyethylene ether (meth)acrylate and allyl alkyl alcohol polyoxyethylene ether. The method has cheapness and easiness to obtain raw materials, ease to control synthesis conditions, and high yield. The present invention has excellent tackifying performance, temperature resistance, salt resistance and hydrolysis resistance, so that it shows good application prospects in the aspect of enhancing recovery ratios and hydraulic fracturing in oilfields.

A curable composition including a silicone copolymer, a fluoropolyether group-containing compound, and a matrix-forming composition, wherein the silicone copolymer has two or more crosslinkable groups; and the crosslinkable group is a group containing a carbon-carbon double bond, a carbon-carbon triple bond, a cyclic ether group, a hydroxyl group, a thiol group, an amino group, an azide group, a nitrogen-containing heterocyclic group, an isocyanate group, a halogen atom, a phosphoric acid-containing group, or a silane coupling group, or a precursor group thereof. Also disclosed is a film formed from the curable composition, and an article including a substrate and a layer on a surface of the substrate formed from the curable composition.

Provided is a triblock copolymer represented by General Formula (I):
CNR-PEG-CNR  (1)
or a polycation thereof, wherein each CNR is independently a polymer segment having a repeating unit containing as part of a pendant group a cyclic nitroxide radical that binds to the polymer main chain via a linking group having at least one imino group or ether bond, and PEG is a segment containing poly(ethylene glycol).

The present application relates to a multiblock copolymer comprising at least one PA block, at least one PB block, and at least one PC block. PC block is positioned between PA block and PB block, where PC block is a rubber block, and where PA represents a polymer block comprising one or more units of monomer A, PB represents a polymer block comprising one or more units of monomer B, and PC represents a polymer block comprising one or more units of monomer C, with monomers A and B being the same or different.

A liposome for use in delivering a therapeutically active agent to a subject in need thereof is disclosed herein. The liposome comprises: a) at least one bilayer-forming lipid; b) a polymeric compound having the general formula I: ##STR00001## wherein m, n, L, X, Y, and Z are as defined herein; and c) a therapeutically active agent, incorporated in the liposome and/or on a surface of the liposome.

Disclosed are branched PEG molecules, including branched PEG-lipids and branched-PEG proteins, as well as related compositions and methods for making branched PEG molecules. Also disclosed are related compositions, systems, and methods for in vivo delivery of therapeutic and diagnostic agents.