A film oriented in at least the machine direction is described which comprises a polyethylene composition having the following properties: a density of 955-965 kg/m.sup.3; a melt index MI.sub.2 of 0.1-2 g/lO min; a G(G=3000) of 500-1700 Pa; a Mz/G(G=3000) at least 500 Da/Pa. The film can form a layer in a multilayer film, which made in turn be made into articles such as stand-up pouches.

A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer. The polyethylene polymer has a narrow molecular weight distribution. Polymer articles made in accordance with the present disclosure have enhanced strength properties. In one embodiment, the polymer composition is used to form a porous membrane for use as a separator in electronic devices.

A polymer composition for producing gel extruded articles is described. The polymer composition contains polyethylene particles combined with a plasticizer. The polyethylene polymer has a narrow molecular weight distribution. Polymer articles made in accordance with the present disclosure have enhanced strength properties. In one embodiment, the polymer composition is used to form a porous membrane for use as a separator in electronic devices.

This disclosure relates to a continuous solution three reactor polymerization process. Process solvent, ethylene, optional comonomers, optional hydrogen and a single site catalyst system are injected into a first and second reactor configured in parallel to one another. A third reactor receives effluent from the first reactor, the second reactor, or a combination of the first and second reactors. Fresh monomer is feed to the third reactor for further polymerization and to give a final polyethylene product.

This disclosure relates to a continuous solution three reactor polymerization process. Process solvent, ethylene, optional comonomers, optional hydrogen and a single site catalyst system are injected into a first and second reactor configured in parallel to one another. A third reactor receives effluent from the first reactor, the second reactor, or a combination of the first and second reactors. Fresh monomer is feed to the third reactor for further polymerization and to give a final polyethylene product.

A multi-component ionomer, wherein, in a multi-component copolymer (D) comprising, as essential constitutional units, a structural unit (A) derived from at least one selected from the group consisting of ethylene and an -olefin containing 3 to 20 carbon atoms, a structural unit (B) derived from a monomer containing at least one selected from the group consisting of a carboxy group and a dicarboxylic anhydride group, and a structural unit (C) derived from a specific acyclic monomer, at least a part of at least one selected from the group consisting of a carboxy group and a dicarboxylic anhydride group of the structural unit (B) is converted into a specific metal-containing carboxylate, and wherein a phase angle at which an absolute value G* of a complex modulus measured with a rotational rheometer is 0.1 MPa (G*=0.1 MPa) is from 50 degrees to 75 degrees.

A polypropylene composition made from or containing: A) from 90.6 wt % to 97.0 wt % of a propylene homopolymer having a melt flow rate between 40.0 g/10 min and 100.0 g/10 min; and B) from 3.0 wt % to 9.4 wt % of a propylene ethylene copolymer having an ethylene content ranging from 22 wt % to 38 wt %; wherein the polypropylene composition having: i) a xylene soluble fraction at 25? C. ranging from 5 wt % to 13.0 wt %; ii) the ethylene derived units content on the fraction insoluble in xylene at 25? C. ranging from 0.3 wt % to 1.6 wt %; iii) the ethylene derived units content on the fraction soluble in xylene at 25? C. ranging from 13.2 wt % to 27.0 wt %; and (iv) a melt flow rate, MFR between 35.0 g/10 min and 70.0 g/10 min.

A polypropylene composition made from or containing: A) from 90.6 wt % to 97.0 wt % of a propylene homopolymer having a melt flow rate between 40.0 g/10 min and 100.0 g/10 min; and B) from 3.0 wt % to 9.4 wt % of a propylene ethylene copolymer having an ethylene content ranging from 22 wt % to 38 wt %; wherein the polypropylene composition having: i) a xylene soluble fraction at 25? C. ranging from 5 wt % to 13.0 wt %; ii) the ethylene derived units content on the fraction insoluble in xylene at 25? C. ranging from 0.3 wt % to 1.6 wt %; iii) the ethylene derived units content on the fraction soluble in xylene at 25? C. ranging from 13.2 wt % to 27.0 wt %; and (iv) a melt flow rate, MFR between 35.0 g/10 min and 70.0 g/10 min.

The present process embodiments for synthesizing long-chain branched copolymers include contacting together one or more C.sub.2-C.sub.14 alkene monomers, at least one diene or polyene, optionally a solvent, and a multi-chain catalyst. The multi-chain catalyst includes a plurality of polymerization sites and produces at least two polymer chains of the C.sub.2-C.sub.14 alkene monomers, each polymer chain polymerizing at one of the polymerization sites. The process synthesizes the long-chain branched polymers by connecting the two polymer chains with the diene or polyene, the joining of the two polymer chains being performed in a concerted manner during the polymerization.

The present process embodiments for synthesizing long-chain branched copolymers include contacting together one or more C.sub.2-C.sub.14 alkene monomers, at least one diene or polyene, optionally a solvent, and a multi-chain catalyst. The multi-chain catalyst includes a plurality of polymerization sites and produces at least two polymer chains of the C.sub.2-C.sub.14 alkene monomers, each polymer chain polymerizing at one of the polymerization sites. The process synthesizes the long-chain branched polymers by connecting the two polymer chains with the diene or polyene, the joining of the two polymer chains being performed in a concerted manner during the polymerization.