摘要:
A method for forming a nanocomposite by olefin polymerization in which at least one cation-exchanging layered load material, selected from the group consisting of cation-exchanging, layered inorganic silicates and cation-exchanging, layered compounds other than silicates, is treated with acid to disrupt its layered structure and is combined with a catalyst that becomes activated for olefin polymerization when in contact with the acid-treated filler. An olefin is contacted by the activated catalyst - filler combination either (a) in the absence of an alkylaluminum co-catalyst or (b) with an alkylaluminum co-catalyst when the activatable catalyst is a polyalkylmetal compound, to form a nanocomposite containing polyolefin and the acid-treated filler. In a particular embodiment, sufficient filler is used to constitute at least 30 weight % of the nanocomposite to prepare a highly loaded nanocomposite masterbatch. A predetermined amount of one or more olefinic polymers can then be blended with the masterbatch to obtain a nanocomposite having a desired amount of loading. The filler is preferably clay, exemplified by montmorillonite. The catalyst is preferably a non-metallocene catalyst, most preferably a nickel complex bearing an a-iminocarboxamidato ligand.
摘要:
The invention relates to a foam material (FP) comprising a polymer composition (C) comprising at least a polyphenylene sulfide polymer (PPS) and at least one functionalized elastomer (E). The present invention also relates to a process for the manufacture of said foam material (FP) and to an article (A) including said foam material (FP), for example a composite material.
摘要:
The various embodiments of the present invention disclose an peroxide-vulcanised TPVs based on Hevea Brasiliensis natural rubber, polypropylene and solid sulfonic acid doped polyaniline [PAni.DBSA] with useful electrical conductivities (up to about 2.1 ± 0.2 S/cm] can be produced by using an internal mixer. The peroxide-vulcanised TPVs exhibit useful physical properties and also possess a reasonable good electromagnetic interferences shielding effectiveness. These peroxide-vulcanised TPVs could be recycled up to 4 times without significant loss of their EMI SE, electrical and physical properties. As a result, they have good potential to be used for manufacturing any EMI shielding products, such as EMI shielding seals and gaskets.
摘要:
The present invention is biaxially oriented film comprising a layer comprising a propylene polymer composition comprising a high isotactic homopolymer of propylene and a polymeric α-nucleating agent. The composition may also comprise other propylene polymers.
摘要:
The present invention relates to a newpolypropylene composition with improved processability and heat resistance for use in a capacitor film, as well as a cast film and a biaxially oriented film for the use as capacitor film comprising such polypropylene composition.
摘要:
The present invention relates to a process for making a thermoplastic composition, comprising the steps of: a) melt mixing a first thermoplastic polymer and a paper product comprising a mixture of cellulose fibers and a second thermoplastic polymer.
摘要:
A painted article includes a primer layer between a substrate and a paint layer, of which the substrate is the product of a substrate forming composition including an olefin block copolymer and a polypropylene polymer having a density from 0.89 g/cm 3 and 0.92 g/cm 3 . The substrate is free of (1) phthalate-based plasticizer, (2) halogen-containing polymer, and (3) leachable, small polymeric units derived from styrene monomer.
摘要翻译:涂漆制品包括在基材和涂料层之间的底漆层,其中基材是包含烯烃嵌段共聚物的基材形成组合物和密度为0.89g / cm 3和0.92g / cm 3的聚丙烯聚合物的产物。 基材不含(1)邻苯二甲酸酯类增塑剂,(2)含卤聚合物,和(3)衍生自苯乙烯单体的可浸出的小聚合物单元。
摘要:
Blended compositions that can include one or more thermoplastic polymers and one or more organic fillers and methods for making and using same. The blended composition can have a Notched Izod Impact Strength of at least 20 J/m to about 600 J/m, measured according to ASTM D256-10, and a melt index of about 1 g/10 min to about 100 g/10 min, measured according to ASTM D1238-13, procedure B. The thermoplastic copolymer can include a blend of a polypropylene homopolymer and a copolymer of propylene and a comonomer. The comonomer can include ethylene, a C 4 to C 20 olefin, or any mixture thereof. The copolymer of propylene and the comonomer can include about 0.5 wt% to about 40 wt% of the comonomer. The blended composition can include about 5 wt% to about 30 wt% of the organic filler based on the combined weight of the thermoplastic copolymer and the organic filler.
摘要:
Le procédé de fabrication d'une composition consiste à mettre en présence un produit contenant majoritairement du polypropylène présentant une fluidité contrôlée inférieure à 10 g/10 min avec du polypropylène très fluide et un polymère greffé par de l'anhydride maléique.