A process for compounding a thermoplastic composition comprising performance additives for use in additive manufacturing.

The present disclosure relates to the use of occluding fluids, such as a high-density fluid (a “z-fluid”) or a low-density fluid (an “a-fluid”), to displace resin within a vat during 3D printing. Further, an a-fluid may act as a protective boundary for a 3D printing resin wherein the a-fluid sits on top of the printing resin. Another embodiment of the disclosure provides a process of assessing which regions of a computer-aided design (CAD) model take advantage of a buoying force supplied by the occluding fluid, such that fewer support structures are needed for printing a final CAD model compared to printing the CAD model without the occluding fluid.

A polyphenylene sulfide resin composition exhibits excellent initial toughness and toughness after a long-term high temperature treatment typified by a tensile elongation at break after a dry heat treatment without impairing mechanical strength, chemical resistance and electrical insulation properties. The polyphenylene sulfide resin composition includes 0.01 to 10 parts by weight of an organosilane compound and 0.01 to 5 parts by weight of a metal salt of phosphorus oxoacid based on 100 parts by weight of a polyphenylene sulfide resin, and a tensile elongation at break, which is measured in accordance with ASTM-D638 under the conditions of a tensile speed of 10 mm/min and an ambient temperature of 23° C. after treating at 200° C. for 500 hours using an ASTM No. 4 dumbbell test piece obtained by injection molding the composition, is 10% or more.

Provided are a method of producing a curved member, the method containing preparing a polycarbonate resin laminate with a hard coat layer for heat bending that includes a permeation layer (B layer) and a hard coat layer (C layer) sequentially layered on at least one surface of a polycarbonate resin base material layer (A layer) having a thickness of from 0.1 mm to 20 mm, and satisfying the requirements (a) to (d), pre-heating the polycarbonate resin laminate at from a temperature higher than Tg by 5° C. to a temperature higher than Tg by 70° C., in which Tg (° C.) is a glass transition temperature of a polycarbonate resin of the prepared polycarbonate resin laminate, and curving the polycarbonate resin laminate obtained by the pre-heating by applying pressure to the polycarbonate resin laminate, and a polycarbonate resin laminate with a hard coat layer for heat bending.

The present disclosure is directed to systems and methods for synthesizing a spidroin. In some embodiments, the methods comprise synthesizing a monomer in vivo in a heterologous host, the monomer comprising an N-terminus IntC domain and a C-terminus IntN domain, and post-translationally polymerizing the synthesized monomer via in vitro split-intein mediated polymerization.

The present invention relates to a method for the manufacture of a modified polycarbonate comprising reacting polycarbonate with at least one primary amide in a melt mixing device at a temperature of at least 230° C. for a period of at least 0.5 minutes.

The present invention relates to pharmaceutical dosage forms, for example to a tamper resistant dosage form including an opioid analgesic, and processes of manufacture, uses, and methods of treatment thereof.

Provided is a method of producing a film by cryogenically grinding polypropiolactone to form a powder, and extruding the powder to form the film. Provided herein are also polypropiolactone films having certain biocontent and compostability, as well as certain mechanical and physical properties. Such films may also be suitable for use as packaging materials.

A method of thermoforming is described. The method comprises providing a multilayer polymer film comprising at least one first thermoplastic polymer layer having a glass transition temperature (Tg) greater than 60° C. and at least one second polymer layer; and thermoforming the multilayer polymer film into a three-dimensional shape. The second polymer layer can be characterized by one or more properties selected from i) a Tg ranging from 20 to 70° C.; ii) a molecular weight between crosslinks of no greater than 20,000 g/mole; and iii) sufficient crosslinking such that the second polymer layer lacks a thermal melt or softening transition at a temperature up to the decomposition temperature of the second polymer layer. Also described are multilayer films and articles, such as orthodontic aligner and retainer trays.

A method for preparing a vapor sensitive sacrificial support material. The method may include decomposing a polycondensed PEO polymer with heat in the presence of a graphene-like material to release PEO polymer radicals from the polycondensed PEO polymer, such that at least a portion of the PEO polymer radicals become trapped on at least a portion of a surface of the graphene-like material to form a coated graphene-like material, which may be defined as a structural reinforcement material. The method may further include forming the vapor sensitive water-soluble thermoplastic polyethylene oxide graft polymer. The vapor sensitive water-soluble thermoplastic polyethylene oxide graft polymer may include a polyethylene oxide polymer backbone. The vapor sensitive water-soluble thermoplastic polyethylene oxide graft polymer may further include one or more nanoscopic particulate processing aids. The structural reinforcement material may be uniformly dispersed in the vapor sensitive water-soluble thermoplastic polymer composite.