In an example, a flame-retardant, cross-linked polyhydroxyalkanoate (PHA) material includes a first PHA material that is cross-linked to a second PHA material via a phosphorus-based cross-linker.

Compositions are provided in which dendrimers and/or nanoparticles are synthesized with multi-photon responsive elements and self-immolative oligomers. The compositions may be utilized to selectively deliver Payloads within tissue by irradiating the compositions. The compositions may also be used to amplify sensitivity to irradiation.

Polylactic acid-backbone graft and bottlebrush copolymers with low moisture vapor transmission rates are synthesized by polymerizing a lactide-functionalized hydrophobic macromonomer using ring-opening polymerization (ROP). In some embodiments of the present invention, the macromonomer is a lactide-functionalized hydrophobic polymer that may be synthesized by, for example, polymerizing a hydrophobic monomer (e.g., a fluorinated vinyl monomer such as 2,2,2-trifluroethyl methacrylate) capable of undergoing radical polymerization (e.g., styrenic, vinylic, acrylic, etc.) using a brominated lactide initiator via atom transfer radical polymerization (ATRP). The brominated lactide initiator may be 3-bromo-3,6-dimethyl-1,4-dioxane-2,5-dione prepared by, for example, reacting lactide with N-bromosuccinimide in the presence of benzoyl peroxide.

Provided herein according to aspects of the present invention are resins that: (a) are suitable for use in additive manufacturing techniques such as bottom-up and top-down stereolithography, (b) produce objects that are bioresorbable, and (c) produce obects that are flexible or elastic (preferably at at least typical room temperatures of 25° C., and in some embodiments at typical human body temperatures of 37° C.). Such resins may include: (a) a bioresorbable polyester oligomer having reactive end groups; (b) non-reactive diluent; (c) optionally reactive diluent; and (d) a photoinitiator.

In an example, a process includes chemically reacting a polyhydroxyalkanoate (PHA) material having a carboxylic-acid terminated side-chain with an azide material to form a polyisocyanate material.

The invention generally relates to the fields of drug delivery and cell capture. In particular, the invention relates to amphiphilic dendron-coils, micelles thereof and their use for drug delivery vehicles and/or cell capture.

The present invention concerns a process for manufacturing a thermoformable plasticized composite containing cellulose fiber and polylactide by blending the dry cellulose fiber and a compatibilizer in a compactor into pellets, and subsequently reacting the reactive compatibilizer and the mixture of cellulose fiber and polylactide by compounding. The invention also concerns a composite manufactured using said process, as well as further processed products.

A method of sealing an end of a polymer with a carbodiimide compound without liberating an isocyanate compound. A compound including a cyclic structure having one carbodiimide group whose first nitrogen and second nitrogen are bonded together by a bond group is used as an end-sealing agent for the polymer.

The present application relates to a resin or polymer system suitable for two-component compositions, and a resin or polymer system configured for durable coatings with only thin coating weights. The resins and polymer systems of this invention provide high performance extremely thin, low gloss coatings with excellent adhesion, abrasion, scratch and chemical resistance The resins include a polyester component with one or more polyester polyols having a hydroxyl value of about 50 to about 300 and a polyurea component with one or more polyester polyol grafted polyurea polymers having a hydroxyl value of about 20 to about 100. These resin or polymer systems and two-component solvent borne coating compositions including such resin or polymer systems are surprisingly capable of achieving strong adhesion, excellent linear abrasion, and high chemical resistance all at the same time in a dry film thickness of about 2 mil or less, in some instances, about 1.2 mils or less, and in other instances, even about 1 mil or less.

Disclosed is a copolymer of polyglycolide and one or more additives. The copolymer may have a weight-average molecular weight (Mw) in the range of 10,000-1,000,000 and a ratio of a weight-average molecular weight to a number-average molecular weight (Mw/Mn) in the range of 1.0 to 10.0. The copolymer may have a melt index (MFR) in the range of 0.1 to 1000 g/10 min. The copolymer has good mechanical properties, thermal stability and hydrolytic stability. Also provided is a process for preparing the copolymer.