Cement slurries, cured cements, and methods of making cured cement and methods of using cement slurries are provided. The cement slurries have, among other attributes, improved expanding capabilities and may be used, for instance, in the oil and gas drilling industry. The cement slurry comprises water, a cement precursor material, and an expanding agent. The expanding agent comprising at least a poly(acrylic acid)-metal oxide nanocomposite, where the metal oxide comprises MgO, CaO, or both, and the poly(acrylic acid) comprises a t-butyl terminal group, an isobornyl terminal group, or both.

The present invention relates to a process for producing a stable fluorinated latex by emulsion polymerization in the absence of fluorinated surfactant, stabilized by an amphiphilic block copolymer formed in situ. The invention also concerns the aqueous dispersion comprising the fluorinated polymer chains and the amphiphilic block copolymers, obtained by this process.

Thermoplastic elastomer compositions comprising acrylic multigraft copolymers are described. The multigraft copolymers comprise a rubbery polyacrylate backbone and a plurality of randomly spaced glassy polyacrylate side chains. The multigraft copolymers can be prepared using a facile grafting through method that can provide copolymers with enhanced purity. The acrylic multigraft copolymers exhibit microphase separated morphologies and “superelastomeric” properties, including an elongation at break, stress at break, and/or strain recovery behavior that exceeds that of conventional triblock copolymer polyacrylate thermoplastic elastomers.

In some aspects, the present disclosure pertains to multi-arm polymers that comprise a core, a plurality of polymer segments having a first end that is covalently attached to the core and a second end comprising a moiety that comprises a reactive group, wherein the polymer segments comprise one or more free-radical-polymerizable monomers. In some aspects, systems are provided that comprise a first composition comprising such a multi-arm polymer and a second composition comprising a multifunctional compound that comprises functional groups that are reactive with the reactive groups of the multi-arm polymer. In some aspects, systems are provided that comprise crosslinked reaction products of such a multi-arm polymer and such a multifunctional compound.

A block copolymer having the general formula as formula (1): mediator-P.sub.2-P.sub.1-X, formula (1), and the chemical structural formula is ##STR00001##
formula (2), in which the mediator in formula (1) and formula (2) is a regulator, which is a conjugated seven-membered ring structure, P.sub.1 is a first polymer which may be a conjugated or non-conjugated olefin monomer, R.sub.1 is the functional group of P.sub.1, n is the number of the monomer of P.sub.1, which is a positive integer and the range is 10˜1,500. P.sub.2 is a second polymer, m is the number of the monomer of P.sub.2, which is a positive integer and the range is 10˜1,500, and X is the end-functional group of the block copolymer.

A medium for an electro-optic element includes a first block copolymer unit including at least one of a first di-block copolymer and first tri-block copolymer and at least one of a first donor compound and first acceptor compound conjugated with the at least one of the first di-block copolymer and first tri-block copolymer, thereby forming the first block copolymer unit. The medium further includes a second block copolymer unit including at least one of a second di-block copolymer and second tri-block copolymer and at least one of a second donor compound and a second acceptor compound conjugated with the at least one of the second di-block copolymer and second tri-block copolymer, thereby forming the second block copolymer unit. The first block copolymer unit is polymerized with the second block copolymer unit.

The present invention relates to surface modifying agents for polymeric and/or textile materials, methods of making and/or using a surface modifying agent to modify and functionalize polymeric and/or textile materials, and/or methods of using surface modified or functionalized polymeric and textile materials, and/or products using or incorporating surface modified or functionalized polymeric and textile materials. For example, the surface modifying agent in precursor form can be styrene sulfonyl azide monomer, polymer or copolymer capable of undergoing a chemical reaction in the presence of heat or light to form one or more styrene sulfonated nitrene monomers, polymers or copolymers, which are capable of chemically reacting with the surface of a polymeric or textile material to endow a specific or desired chemical surface functionality to the surface of a polymeric or textile material. Furthermore, the present invention is possibly preferably directed to a surface modifying agent which comprises a styrene sulfonated nitrene monomer, polymer or polymer containing one or more nitrene functional groups, which are capable of chemically reacting via an insertion reaction into one or more carbon-hydrogen bonds on the surface of a polymeric or textile material in order to chemically attach a specific or desired chemical functionality to the surface of a polymeric or textile material.

The present invention discloses a film for a medicine packaging and a method of preparing the same. The film for the medicine packaging includes a polymer film layer, a graphene composite layer and a light-curable adhesive, wherein the polymer film layer is bonded with a graphene composite layer by a light-curable adhesive, the graphene composite layer includes multiple graphene layers bonded by the light-curable adhesive; and the light-curable adhesive includes a hyperbranched cationic mussel-imitated polymer including a multi-hydroxylbenzoylbenzamide ene amide monomer, a cationic monomer and a photo-responsive monomer. The present invention provides strong adhesion with reduced adhesive layer, allowing greatly increasing the number of the graphene layers in the graphene composite layer without obvious increase in the total thickness and mass. This can meet the requirements of the medicine packaging material, as it obviously lowers the film's permeation to water vapor and oxygen and significantly enhances the tensile strength.

Controlled radical initiators, reaction mixtures containing the controlled radical initiators and various ethylenically unsaturated monomers, polymeric materials formed from the reaction mixtures, crosslinkable compositions containing the polymeric materials, crosslinked compositions formed from the crosslinkable compositions, and various articles are provided. The controlled radical initiators are bis-dithiocarbamate or bis-dithiocarbonate compounds having a carbonyl group between the two dithiocarbamate or dithiocarbonate groups.

A radiation-sensitive resin composition contains: a polymer having a first structural unit represented by formula (1), and a second structural unit represented by formula (2) and having an acid-labile group. A first acid, to be generated from the first acid generating agent, disassociates the acid labile group in the polymer upon heating under a condition involving a temperature of no less than 80° C. and no greater than 140° C. for a time period of 1 minute, and the second acid, to be generated from the second acid generating agent, does not substantially disassociate the acid-labile group under the condition. The polymer is synthesized by RAFT, ATRP, or NMP, and a RAFT agent is at least one selected from the group consisting of a mercaptocarboxylic acid ester, a disulfide, a dithioester, a xanthate, a dithiocarbamate, and a trithiocarbonate. ##STR00001##