This disclosure relates to methods for determining the quality of polymers, more particularly, polyolefins. The methods involve Raman spectroscopy and artificial intelligence to compute polymer properties and/or features.

The present disclosure relates to a glossy, uniform pearlescent appearance in an oriented polyester article without the use of pearlescent or metallic pigments.

A resin composition for injection forming containing a high-density polyethylene, an ethylene-vinyl alcohol copolymer and an acid-modified linear low-density polyethylene, characterized in that the ethylene-vinyl alcohol copolymer is contained in an amount of 35 to 90 parts by mass and the acid-modified linear low-density polyethylene is contained in an amount of 10 to 35 parts by mass per 100 parts by mass of the high-density polyethylene.

A method for preparing a modified polycarbonate comprising i) providing a polycarbonate prepared by the melt transesterification of a bisphenol and a diaryl carbonate preferably having a Fries branching level of from 750 to 2000 ppm, ii) combining said polycarbonate and from 0.10-0.75 wt. %, based on the amount of polycarbonate, of a modifier, iii) reacting said modifier and said polycarbonate in molten state at a temperature of from 250-300 C. and a reaction time of at least 30 seconds so as to form the modified polycarbonate, wherein said modifier is a styrene-(meth)acrylate copolymer containing glycidyl groups and having i) from 250 to 500 gram epoxy groups per mol and ii) a weight average molecular weight of from 3000 to 8500 g/mol, and wherein said modified polycarbonate has a transmittance of at least 85% and a haze of at most 5% as determined in accordance with ASTM D1003-13 on an injection moulded sheet having a thickness of 3 mm.

The disclosure relates to processes for producing lightweight polyethylene terephthalate bottles that retain good barrier properties against the permeation of oxygen, carbon dioxide and/or water vapor. The use of relatively small amounts of polyethylene furandicarboxylate during the formation of the PET bottles can produce a bottle having the required barrier properties and result in the use of less material.

Bimodal polyethylene compositions for use in hot-fill closures and processes.

Disclosed herein is an oxygen scavenging composition for containers. The oxygen scavenging composition for containers may comprise at least one polyester component, a transition metal catalyst, an oxygen scavenger, and a vegetable oil. The vegetable oil preferably comprises at least one molecule having a double allylic structure. The polyester component preferably comprises at least one acid unit and at least one diol unit. The concentration of double allylic structures of the vegetable oil in the composition may be greater than 5.0 meq/kg of all of the polyester components. The oxygen scavenger is preferably present in the composition at a level less than 1.0% by weight of the total composition. The vegetable oil is preferably present in the composition at a level greater than 0.3% by weight relative to the total weight of the polyester components, the transition metal catalyst and the vegetable oil.

New hydrogenated styrenic block copolymers, in particular styrene-ethylene/butylene-styrene copolymers (SEBS copolymers), with improved performance in thermoplastic elastomer compositions (TPE compositions), process for preparing said hydrogenated styrenic block copolymers, reprocessable TPE-S compositions made thereof, method for producing an article from said reprocessable TPE-S compositions and articles made of said reprocessable TPE-S compositions, in particular suitable for medical applications.

The present invention relates to a polyethylene resin suitable for preparing moulded articles, such as caps and closures. The invention provides in particular a polyethylene resin comprising at least two polyethylene fractions A and B, wherein said polyethylene resin has a melt index (MI2), of at least 3.0 g/10 min to at most 5.5 g/10 min as measured according to ISO 1133, condition D, at 190 C. and under a load of 2.16 kg, and a density of at least 0.955 g/cm.sup.3 to at most 0.965 g/cm.sup.3 as measured according to ISO 1183 at 23 C., and a molecular weight distribution M.sub.w/M.sub.n which is at most 7.0, as determined by gel permeation chromatography, with M.sub.w being the weight-average molecular weight and M.sub.n being the number-average molecular weight; and wherein said polyethylene fraction A has a high load melt index (HLMI), as measured according to ISO 1133:1997 condition G at 190 C. and under a load of 21.6 kg, of at least 10.5 and a melt index (MI2) of at least 0.5 g/10 min to at most 1.5 g/10 min as measured according to ISO 1133, condition D, at 190 C. and under a load of 2.16 kg. The invention further relates to a process for preparing said polyethylene resin, to a cap or closure comprising said polyethylene, and to a process for producing such a cap or closure.

A polymer composition includes a polyester, a multifunctional compound, and a polymeric compound containing a salt of a metal. The multifunctional compound is one of polyacid, polyanhydride, and the combination thereof. Based on the polymer composition, the metal is present in an amount ranging from 0.01 mol % to 5.0 mol %. Also disclosed herein are an article prepared from the polymer composition and a method for preparing a resin composition from the polymer composition.