Provided are a liquid crystal polymer (LCP) film and a laminate comprising the same. The LCP film has a first surface and a second surface opposite each other, and a ratio of a ten-point mean roughness relative to a maximum height (Rz/Ry) of the first surface is from 0.30 to 0.62. By controlling Rz/Ry of at least one surface of the LCP film, the peel strength of the LCP film stacked to a metal foil can be increased, and the laminate comprising the same can still maintain the merit of low insertion loss.

A method for preparing a biogenic guanidine complex, the method including: mixing dimethyl sulfoxide (DMSO) with water in a volume ratio thereof of 1:1 to yield a solvent DMSO-H.sub.2O; adding organic guanidine (G) and a compound MX.sub.2 in a molar ratio G/MX.sub.2=1:1 or 2:1 to the solvent DMSO-H.sub.2O, where the organic guanidine (G) is selected from arginine (Arg), guanidinoacetic acid (Gaa), creatine (Cra), creatinine (Cran), guanine (Gua), and agmatine (Agm); M represents Fe.sup.2+, Mg.sup.2+, or Zn.sup.2+; and X represents Cl.sup.−, CH.sub.3COO.sup.−, or CH.sub.3CH(OH)COO.sup.−; stirring the solvent DMSO-H.sub.2O containing the organic guanidine and the compound MX.sub.2; recycling the solvent DMSO-H.sub.2O through vacuum distillation and obtaining a solid; transferring the solid to a Buchner funnel, and washing the solid with deionized water and ethanol consecutively; and removing the deionized water and ethanol through vacuum filtration, and drying the solid.

A polyester polymer composition having a polyester polymer with furanic units as well as a process to prepare this polyester polymer composition are herein described. The process includes the step of reacting a cyclic polyester oligomer in the presence of a catalyst in a ring-opening polymerization reaction with a reaction temperature and a reaction time sufficient to yield a polyester polymer having furanic units. The present invention further provides a method of use of this polyester polymer composition in extrusion, injection molding, or blow molding.

A polyester polymer composition having a polyester polymer with furanic units as well as a process to prepare this polyester polymer composition are herein described. The process includes the step of reacting a cyclic polyester oligomer in the presence of a catalyst in a ring-opening polymerization reaction with a reaction temperature and a reaction time sufficient to yield a polyester polymer having furanic units. The present invention further provides a method of use of this polyester polymer composition in extrusion, injection molding, or blow molding.

The present invention concerns the use of a compound having the following formula (I), for the preparation of a polymer. The present invention also concerns the polymers obtained from polymerization of compound of formula (I), and their processes of preparation.

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The present invention concerns the use of a compound having the following formula (I), for the preparation of a polymer. The present invention also concerns the polymers obtained from polymerization of compound of formula (I), and their processes of preparation.

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In various embodiments, the invention relates to poly(propylene fumarate) (PPF)-based star-shaped copolymers synthesized using a core-first approach that uses a multi-functional alcohols as an initiator, and Mg(BHT).sub.2(THF).sub.2 as catalyst for controlled ring opening copolymerization (ROCOP) of maleic anhydride (MAn) with propylene oxide (PO). In some embodiments, these star-PPF copolymers have lower viscosities than their linear analogs, allowing a decrease in DEF fraction in resin formulation, as well as the use of higher molecular weights. These star-shape PPF can be used to prepare PPF:DEF resins containing as much as 70% by weight of the multi-arm PPF star copolymers, and have a low complex viscosity of high M.sub.n star PPF resin that affords rapid printing with a M.sub.n nearly eight times larger than the largest linear PPF oligomer printed previously.

The present invention describes the preparation of heterogeneous catalysts of mixed oxides based upon niobium and mixed oxides of zinc, manganese, nickel, cobalt and/or aluminum, originating from hydrotalcites (HTs) as precursor phase of heterogeneous catalysts, and application thereof in the chemical recycling of poly(ethylene terephthalate) (PET) for the production of metal free bis(hydroxy)ethylene (BHET) monomers and oligomers having a processing performance similar to that of the homogeneous catalysis system.

An oriented film or a shrink film comprising a polyester composition which comprises at least one polyester which comprises: a dicarboxylic acid component comprising: about 90 to about 100 mole % of terephthalic acid residues; about 0 to about 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and a glycol component comprising: about 10 to about 29 mole % 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and about 71 to about 90 mole % ethylene glycol residues; and optionally, diethylene glycol residues; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; wherein the inherent viscosity of the polyester is from 0.50 to 0.8 dL/g.

An oriented film or a shrink film comprising a polyester composition which comprises at least one polyester which comprises: a dicarboxylic acid component comprising: about 90 to about 100 mole % of terephthalic acid residues; about 0 to about 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and a glycol component comprising: about 10 to about 29 mole % 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and about 71 to about 90 mole % ethylene glycol residues; and optionally, diethylene glycol residues; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; wherein the inherent viscosity of the polyester is from 0.50 to 0.8 dL/g.