摘要:
The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.
摘要:
The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.
摘要:
A nanocomposite having a nanomaterial dispersed into a polymer matrix, in one embodiment exfoliated nanoclay dispersed in a polyurea matrix. A method of making PU-nanocomposites for coatings for improved mechanical properties, in one embodiment the method comprises obtaining and treating a nanomaterial, dispersing the nanomaterial into a pre-polymer matrix, mixing the pre-polymer matrix under heating to form a coating; and depositing the coating on a substrate.
摘要:
Compatibilized blends of an isoolefin polymer and an unsaturated diene polymer are prepared by utilizing a compatibilizing agent comprising a block/graft copolymer containing poly- or copoly-isoolefin segments and C4 to C6 alkyl-substituted styrene polymer segments, such as poly(t-butylstyrene) segments.
摘要:
The present invention provides polymer nanocomposites with dispersed nanotubes and methods of making same. The polymer may be a polyether. For example, the present invention provides an effective method to successfully disperse single walled nanotubes (SWNTs) into both Polyethylenoxide (PEO) and its low molecular weight analog polyethylene glycol (PEG) with hydrodynamic percolation at about 0.09 wt % and an electrical percolation at about 0.03 wt % SWNTs at room temperature, and the resulting nanocomposites. The method may include providing a surfactant. Most notably the present inventors achieved a decrease in the melting point of the polymer and a retardation of polymer crystallization due to the presence of the nanotubes.
摘要:
The present invention provides a method to form a nanocomposite including blending a high molecular weight elastomer, a low molecular weight elastomer, and a clay to form a nanocomposite; wherein the high molecular weight elastomer has a weight average molecular weight greater than 250000; wherein the low molecular weight elastomer has a weight average molecular weight less than 150000. In another embodiment, the invention provides a method to form a nanocomposite including the steps of blending a low molecular weight elastomer and a clay to form a first mixture; blending a high molecular weight elastomer and the first mixture to form the nanocomposite; wherein the low molecular weight elastomer has a weight average molecular weight less than 150000; and, wherein the high molecular weight elastomer has a weight average molecular weight greater than 250000.
摘要:
The invention provides for processes for preparing a nanocomposite compositions including the steps of: contacting a multifunctional intercalant including a cationic moiety separated from an anionic moiety by at least 1 carbon, with a clay at a temperature and for a period of time sufficient to produce an at least partially intercalated clay; and contacting the at least partially intercalated clay with a functionalized interpolymer including one or more functional groups, at a temperature, and for a period of time sufficient to produce the nanocomposite compositions. Cured nanocomposite compositions, and articles including such nanocomposite compositions are also provided.
摘要:
The present invention provides a method to form a nanocomposite including blending a high molecular weight elastomer, a low molecular weight elastomer, and a clay to form a nanocomposite; wherein the high molecular weight elastomer has a weight average molecular weight greater than 250000; wherein the low molecular weight elastomer has a weight average molecular weight less than 150000. In another embodiment, the invention provides a method to form a nanocomposite including the steps of blending a low molecular weight elastomer and a clay to form a first mixture; blending a high molecular weight elastomer and the first mixture to form the nanocomposite; wherein the low molecular weight elastomer has a weight average molecular weight less than 150000; and, wherein the high molecular weight elastomer has a weight average molecular weight greater than 250000.
摘要:
The invention provides for processes for preparing a nanocomposite compositions including the steps of: contacting a multifunctional intercalant including a cationic moiety separated from an anionic moiety by at least 1 carbon, with a clay at a temperature and for a period of time sufficient to produce an at least partially intercalated clay; and contacting the at least partially intercalated clay with a functionalized interpolymer including one or more functional groups, at a temperature, and for a period of time sufficient to produce the nanocomposite compositions. Cured nanocomposite compositions, and articles including such nanocomposite compositions are also provided.
摘要:
The invention provides a thermoplastic composition of C4-C7 isoolefin copolymers including halomethylstyrene derived units blended with a hindered amine or phosphine of the structure R1 R2 R3 N or R1 R2 R3 P wherein R1, R2 and R3 are preferably lower and higher alkyl groups. The resulting ionically associated, amino or phosphine modified elastomers are used to prepare thermoplastic elastomer blend compositions, including dynamically vulcanized compositions, containing more finely dispersed elastomers which results in compositions having improved mechanical properties.