The disclosure discloses a high-frequency transmission LCP film and preparation method thereof. The preparation method comprises the following steps: (1) separately performing acetylation on monomers to obtain acetylated monomers; (2) performing high-temperature polymerization on the acetylated monomers, phenolic resin, acetic anhydride and zinc acetate, and performing pulverization to obtain liquid crystal copolyester; (3) ball milling the liquid crystal copolyester, an inorganic filler, a silane coupling agent and a glass fiber and mixing to obtain a mixture; and melt-plasticizing the mixture to form a film after cooling, performing longitudinal and transverse synchronous stretching, then winding and slitting the film to obtain a high-frequency transmission LCP film. In the disclosure, by adjusting the type and ratio of acetylated monomers and adding phenolic resin, a regular fibrous structure is obtained; and by adding an inorganic filler, a silane coupling agent and glass fibers, its mechanical properties are enhanced and dielectric loss is reduced, thereby obtaining an LCP film with low dielectric constant and low dielectric loss factor which can be applied to the fields of electronics, electricity, optical fiber, 5G communication and the like.

A positive resist composition is provided comprising (A) a specific sulfonium salt as quencher, (B) a sulfonium salt consisting of a fluorinated sulfonate anion and a sulfonium cation as acid generator, and (C) a base polymer comprising repeat units having an acid labile group. The resist composition has a high sensitivity and resolution, improved LWR or CDU, and a broad process window and forms a pattern of good profile after exposure.

A cake material is disclosed, made up of polyhydroxyalkanoate (PHA) cake that is formed directly from biomass and subsequent purification processes absent any heated drying step, with a moisture content of no less than about 5% by weight, and a Dv (90) particle size of no more than about 8 microns.

A cake material is disclosed, made up of polyhydroxyalkanoate (PHA) cake that is formed directly from biomass and subsequent purification processes absent any heated drying step, with a moisture content of no less than about 5% by weight, and a Dv (90) particle size of no more than about 8 microns.

A biodegradable aqueous mixture for coating substrates is disclosed, which includes from about 35 to about 75 weight percent water and from about 25 to about 65 weight percent solids. The solids in turn are made up of from about 40 to about 99 weight percent polyhydroxyalkanoates based on the total dry weight of the solids. Moreover, the polyhydroxyalkanoates are in the form of polyhydroxyalkanoate particles having a moisture content of no less than about 1% by weight prior to mixing with the water and a Dv (90) particle size of no more than about 10 microns, as determined using ISO 8130-13:2019.

A biodegradable aqueous mixture for coating substrates is disclosed, which includes from about 35 to about 75 weight percent water and from about 25 to about 65 weight percent solids. The solids in turn are made up of from about 40 to about 99 weight percent polyhydroxyalkanoates based on the total dry weight of the solids. Moreover, the polyhydroxyalkanoates are in the form of polyhydroxyalkanoate particles having a moisture content of no less than about 1% by weight prior to mixing with the water and a Dv (90) particle size of no more than about 10 microns, as determined using ISO 8130-13:2019.

Provided are thermoplastic polymer particles having an aspect ratio of 1.00 or more and less than 1.05, and a roundness of 0.95 to 1.00. The thermoplastic polymer particles are formed from a thermoplastic polymer resin in a continuous matrix phase. The thermoplastic polymer particles show a peak cold crystallization temperature (T.sub.cc) at a temperature between a glass transition temperature (T.sub.g) and the melting point (T.sub.m) in a differential scanning calorimetry (DSC) curve which is derived from temperature rise analysis at 10° C./min by differential scanning calorimetry.

Provided are thermoplastic polymer particles having an aspect ratio of 1.00 or more and less than 1.05, and a roundness of 0.95 to 1.00. The thermoplastic polymer particles are formed from a thermoplastic polymer resin in a continuous matrix phase. The thermoplastic polymer particles show a peak cold crystallization temperature (T.sub.cc) at a temperature between a glass transition temperature (T.sub.g) and the melting point (T.sub.m) in a differential scanning calorimetry (DSC) curve which is derived from temperature rise analysis at 10° C./min by differential scanning calorimetry.

An environmentally friendly can for containing a product includes a sealed container that contains the product and includes a polyester resin and a release mechanism to open the container and access the product. The polyester resin may be a furan resin selected from poly (ethylene 2, 5-furan dicarboxylate) (PEF), poly (butylene 2, 5-furan dicarboxylate) (PBF), poly (trim ethylene furan dicarboxylate) (PTF), poly (propylene 2, 5-furandicarboxylate) (PPF), and poly (neopentyl 2, 5-furandicarboxylate) (PNF); and/or a biodegradable polyester resin such as polyglycolic acid (PGA). The can may further include a generally cylindrical shell molded to have a sealed bottom and a straight wall that includes the resin; and a cap to seal the shell, the cap having the release mechanism and a rim that includes the resin; wherein the rim of the cap is bonded to the wall of the shell to releasably seal the product inside the can.

The present disclosure provides copolymers useful in medical devices. For example, the disclosure provides copolymers comprising the polymerization product ester block, ether blocks and diisocyanates. In certain embodiments, the disclosure provides a medical copolymer for implantation comprising ester blocks and ether blocks, wherein: the ester blocks comprise a negative free energy transfer and the ether blocks comprise a positive free energy transfer, the ether and ester blocks are less than 1/10 the length of said copolymer, and, the blocks are distributed such that no domain of contiguous blocks possessing the same polarity of free energy transfer are less than ⅓ of the molecular weight of the copolymer. The disclosure further provides methods of making the aforementioned polymers, and medical devices comprising the polymers.