Provided herein are metallocene-catalyzed polymer compositions that exhibit advantageous rheological properties, at least some of which are consistent with long-chain branching, as well as polymerization processes suitable for forming such polymer compositions. The polymer compositions may have both LCB index measured at 125° C. of less than 5; and phase angle δ at complex shear modulus G*=100,000 Pa of less than about 54.5°, as determined at 125° C. The polymer compositions of particular embodiments are reactor blends, preferably of ethylene copolymers (e.g., ethylene-propylene (EP) copolymers and/or ethylene-propylene-diene (EPDM) terpolymers). The reactor blend may include first and second copolymer components, which may differ in monomer content and weight-average molecular weight (Mw).

A tire sidewall comprising a vulcanized rubber and a polymeric organo silicon compound.

A tire sidewall comprising a vulcanized rubber and a polymeric organo silicon compound.

A tire sidewall comprising a vulcanized rubber and a polymeric organo silicon compound.

The present invention relates to a non-halogen thermoplastic resin composition and a cable including the same. More particularly, the present invention provides a non-halogen thermoplastic resin composition in which a halogen-based flame retardant causing environmental and human health problems is not included and the content of a phosphorus flame retardant causing decrease in appearance and properties is decreased, but which has identical or superior mechanical strength, chemical resistance, heat resistance, and flame retardancy, compared to existing thermoplastic resin compositions, and a cable including the same.

A heterogeneous vulcanized polymer blend comprising a continuous phase comprising a thermoplastic polypropylene having a crystallinity of at least 30% and a dispersed phase comprising particles of an elastomeric copolymer dispersed in the continuous phase and having an average particle size of less than 5 micron. The elastomeric copolymer has a crystallinity of less than 20% and is at least partially cross-linked such that no more than about 80 wt % of the elastomeric copolymer is extractable in cyclohexane at 23° C.

A heterogeneous vulcanized polymer blend comprising a continuous phase comprising a thermoplastic polypropylene having a crystallinity of at least 30% and a dispersed phase comprising particles of an elastomeric copolymer dispersed in the continuous phase and having an average particle size of less than 5 micron. The elastomeric copolymer has a crystallinity of less than 20% and is at least partially cross-linked such that no more than about 80 wt % of the elastomeric copolymer is extractable in cyclohexane at 23° C.

A heterogeneous vulcanized polymer blend comprising a continuous phase comprising a thermoplastic polypropylene having a crystallinity of at least 30% and a dispersed phase comprising particles of an elastomeric copolymer dispersed in the continuous phase and having an average particle size of less than 5 micron. The elastomeric copolymer has a crystallinity of less than 20% and is at least partially cross-linked such that no more than about 80 wt % of the elastomeric copolymer is extractable in cyclohexane at 23° C.

Provided is a paper feeding roller in which recesses due to deformation are unlikely to be formed even when contact with another roller in one location continues for a comparatively long period of time, particularly as a conveying roller or the like. A paper feeding roller that has a shaft measuring 6 mm in exterior diameter pressure-welded to the outer circumferential surface under a load of 600 g in a high-temperature environment of 60° C. for 24 hours is left at room temperature for eight hours while being pressure-welded, after which the recess amount obtained using the difference (T).sub.0−T.sub.1, between the thickness T.sub.1 (mm) of the position where the shaft was pressure-welded and the thickness T.sub.0 (mm) of a position where the shaft was not pressure-welded, is 0.1 mm or less.

Provided is a paper feeding roller in which recesses due to deformation are unlikely to be formed even when contact with another roller in one location continues for a comparatively long period of time, particularly as a conveying roller or the like. A paper feeding roller that has a shaft measuring 6 mm in exterior diameter pressure-welded to the outer circumferential surface under a load of 600 g in a high-temperature environment of 60° C. for 24 hours is left at room temperature for eight hours while being pressure-welded, after which the recess amount obtained using the difference (T).sub.0−T.sub.1, between the thickness T.sub.1 (mm) of the position where the shaft was pressure-welded and the thickness T.sub.0 (mm) of a position where the shaft was not pressure-welded, is 0.1 mm or less.