摘要:
A flower-like nano-particle composition including a poly(alkenylbenzene) core and a poly(conjugated diene) or a poly(alkylene) surface layer is provided. The nano-particles have a mean average diameter less than about 100 nm and are substantially free of chain ends. The nano-particles can be modified via, for example, hydrogenation. The nano-particles can advantageously be incorporated into rubbers, elastomers, and thermoplastics.
摘要:
A polymeric nanoparticle composition is provided. The nanoparticle may be of a core/shell configuration with an interphase region connecting the core and the shell. The mean average diameter of the polymer nanoparticles may be less than about 250 nm. The size, composition, and/or configuration of the interphase region may be varied to achieve desired physical and/or chemical properties of the resulting polymeric nanoparticles, and of the compositions into which the nanoparticles are compounded.
摘要:
Provided is a polymer nanoparticle comprising a core and a vulcanizable shell, wherein the core has a glass transition temperature (Tg) of at least about 150° C. Also provided is a method of preparing polymer nanoparticles with a core and a vulcanizable shell, comprising (a) in a liquid hydrocarbon medium, polymerizing conjugated diene monomers to produce a poly(conjugated diene) block and (b) copolymerizing the poly(conjugated diene) block with a mixture of mono-vinyl aromatic monomers and multiple-vinyl aromatic monomers to produce an aromatic block, wherein the core has a Tg of at least about 150° C. Also provided is a composition comprising (a) a rubber matrix; and (b) a polymer nanoparticle including a core and a vulcanizable shell; wherein the Tg of the core is at least about 150° C.
摘要:
The present invention provides a nano-composite comprising a clay and a cationic mediator comprised of a hydrophobic unit and a cationic unit. The clay is exfoliated or intercalated by the cationic mediator. The present invention further provides a polymer formulation comprising the nano-composite. The nano-composite is practically useful in formulating compositions such as rubber and tire products with improved and well-balanced properties including gas permeability, cure properties, and/or mechanical properties etc.
摘要:
A gel composition that is the combination of or reaction product of ingredients comprising a thermoplastic elastomer copolymer comprising polystyrene-b-poly(ethylene-ethylene/propylene)-b-polystyrene, a nylon-grafted elastomer, and an extender.
摘要:
A nano-particle composition including a poly(alkenylbenzene) core and a poly (conjugated diene) or a poly(alkylene) surface layer is provided. The nano-particles have a mean average diameter less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionalization. The nano-particles can advantageously be incorporated into rubbers, elastomers, and thermoplastics.
摘要:
A composition comprising an elastomer, a filler, and a comb-like polymer, the comb-like polymer comprising a backbone and a plurality of side chains, the backbone having a length greater than or equal to the entanglement length, the side chains having a length greater than about 33% of the entanglement length, the backbone including at least one side chain per entanglement length, and the comb-like polymer having a Tg of less than −5° C.
摘要:
A polymer nanoparticle is provided. The nanoparticle includes an inner layer having alkenylbenzene monomer units. The nanoparticle further includes an outer layer having monomer units selected from conjugated dienes, alkylenes, alkenylbenzenes, and mixtures thereof. The nanoparticle has at least one functional group associated with the outer layer. Applications of use as additives for rubber, including the rubber compositions, are also provided.
摘要:
A nano-particle composition including a poly(alkenylbenzene) core and a poly(conjugated diene), a poly(alkylene), or a poly(alkenylbenzene) surface layer is provided. The nano-particles have a mean average diameter of less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionalization. The nano-particles can be advantageously be incorporated into rubbers, elastomers, and thermoplastics.
摘要:
A process that enables the formation of a high damping, soft polymer gel includes reacting a maleimide copolymer with a maleated polyalkylene and an alkyl diamine under substantially dry conditions sufficient to form a polyalkylene-grafted maleimide copolymer product which then is dispersed with an extender sufficient to form the gel. The steps can be carried out sequentially in a high shear mixer without the need for intermediate steps of cooling and grinding the reaction product of one step before proceeding to the next.