Novel absorbable polymer blends are disclosed. The blends are useful for manufacturing medical devices having engineered degradation and breaking strength retention in vivo. The blends consist of a first absorbable polymeric component and a second absorbable polymeric component. The weight average molecular weight of the first polymeric component is higher than the weight average molecular weight of the second polymeric component. At least at least one of said components is at least partially end-capped by a carboxylic acid group. Further aspects are medical devices made therefrom.

A polymeric compound involves a blend of 50 wt % or greater of a thermoplastic having an average melting point (T.sub.m) of less than 200 ° C. and less than 50 wt % of a butyl rubber ionomer dispersed in a matrix of the thermoplastic, weights based on total weight of the thermoplastic and butyl rubber ionomer. Such blends may exhibit improved physical properties compared to unblended thermoplastic, particularly ultimate elongation and/or damping. The polymeric compounds are useful for forming a variety of articles of manufacture.

A bimodal polypropylene composition of at least a high molecular weight, predominantly isotactic, narrow molecular weight distribution polypropylene having a heat of fusion of 70 to 100 J/g, and a low molecular weight, predominantly isotactic, narrow molecular weight distribution polypropylene having a heat of fusion of 70 to 100 J/g, wherein the high molecular weight polymer and low molecular weight polymer are sufficiently miscible to impart a single glass transition temperature and a single melting point to the polymer blend, has improved processibility and stiffness compared to a single narrow molecular weight distribution isotactic polypropylene of the average of the components.

The invention relates to a thermoplastic polymer powder and to the use thereof as material for selective laser sintering (SLS). The polymer powder contains a semi-crystalline polyolefin, an amorphous styrene-polymer and a selected polymeric compatibilizer, in addition to optionally further additives and/or auxiliary agents. The semi-crystalline polymer, amorphous polymer and selected polymeric compatibilizer are present in the polymer powder in the form of a polymer blend. The invention also relates to a method for producing the thermoplastic polymer powder and to a method for selective laser sintering (SLS) using the polymer powder according to the invention.

A method for preparing a vulcanizable composition of matter, the method comprising mixing, within a first mixing step, rubber, silica, and silica coupling agent to form a first masterbatch composition, adding nicotinamide to the first masterbatch composition and mixing within a second mixing step to form a second masterbatch composition, and adding a curative to the second masterbatch composition and mixing within a final mixing step.

Vinyl resin compositions containing nanocrystalline materials, films formed therefrom, laminates formed from such films, and methods of making and using thereof are described herein.

Provided is a sea-island composite fiber having excellent spinnability and thermoplastic deformability. The sea-island composite fiber comprises an island component and a sea component having a lower melting point than that of the island component, wherein the fiber has an aspect ratio of from 2.0 to 5.0 in a fiber cross section; and the sea component has a sea component thickness of from 0.2 to 2.0 μm, the sea component thickness being defined as a distance between an outer periphery of the fiber and an island component closest to the outer periphery on a minor axis of the fiber cross section.

Methods for preparing pre-dynamic cross-linked polymer compositions are described. Methods of preparing dynamic cross-linked polymer compositions using pre-dynamic cross-linked polymer compositions are also described.

A method for making a polyamide composition, in particular for molding, prepared by mixing a polyamide material, a powder made from airbag scraps, and optionally reinforcing fillers is described. Also described, is a method for recycling used airbags.

A resin composition is provided. The resin composition includes a styrene-acrylonitrile based copolymer of 75 parts by weight to 90 parts by weight and rubber particles of 10 parts by weight to 25 parts by weight. The resin composition includes an oligomer trimer. The oligomer trimer includes at least one monomer unit selected from the group consisting of a styrene based monomer unit and an acrylonitrile based monomer unit. Wherein, a residual acrylonitrile based monomer is less than 5 ppm of the total weight of the resin composition. The ratio of the peak area of acetophenone to the peak area of air for the resin composition as analyzed by a thermal desorption gas chromatography mass spectrometer (TD-GC-MS) is 100 to 300.