Various precursor solutions and methods of 3D printing and other additive manufacturing approaches are provided for the manufacture of articles using photocrosslinkable vinyl shape memory polymers. In various aspects, articles are manufactured by a process comprising (i) exposing a precursor solution to an intensity and frequency of light to initiate photo-polymerization of the precursor solution to form a layer of the article; and (ii) repeating step (i) a number of times to form the article in a layer-by-layer approach; wherein the precursor solution comprises a first polymeric precursor comprising a plurality of vinyl terminated side-chains attached thereto. A vinyl-functionalized, photocrosslinkable SMP used as an example herein is a novel variant of a previously disclosed SMP composition, with higher amounts of vinyl functionalization but similar thermomechanical properties to the SMP library previously disclosed. Moreover, a unique combination of chemistries is disclosed that incorporates the aforementioned vinyl-functionalized SMPs along with acrylate-based crosslinkers. Additional novel compositions are disclosed containing the vinyl-functionalized SMPs with additional dithiol functionalizations, vinyl-functionalized SMPs with dithiol crosslinkers, as well as vinyl-functionalized SMPs with both acrylate-based and dithiol crosslinkers, as another means to tune degradation rates and other material properties. The articles can include a variety of articles such as stents, grafts, external sheaths, and the like. Beneficially, the printed articles can include a plurality of pores having an average diameter of about 50 pm to about 5000 pm, about 500 pm to about 2000 pm, or about 1000 pm even in the absence of a photoblocker.

The present disclosure describes polymers and improved resin systems having flexibility, low water uptake, good adhesion, chemical resistance, and/or weatherability at extreme negative temperatures, such as temperatures down to about −40° C. or below and even temperatures down to about −60° C. The systems herein, in approaches, include a polymer or resin system for an epoxy component of an epoxy/amine system including an epoxy and/or acetoacetoxy functionalized flexible block copolymer that has a base hydrophobic polyol block or core, optional flexible monomeric blocks, and epoxy, acetoacetoxy, or both functional endcaps.

The presently claimed invention relates to a dispersant containing oxyalkylenecarbonyl units and a process for its preparation. The presently claimed invention is also directed to the use of the dispersant in a coating composition or an ink composition.

A cross-linkable hydrogel composition comprising an aqueous base carrier composition and a cross-linkable hydrogel precursor, wherein the aqueous base carrier composition comprises one or more polymers and one or more nanoparticles, wherein the one or more polymers are selectively adsorbed to the one or more nanoparticles, and wherein the one or more polymers and the one or more nanoparticles form a shear-thinning and self-healing hydrogel and wherein the one or more polymers and the one or more nanoparticles and cross-linkable hydrogel precursor are each comprised in the cross-linkable hydrogel composition in a concentration at which neither the one or more polymers nor the nanoparticles, taken alone, form a hydrogel, characterized in that the cross-linkable hydrogel precursor is not selectively adsorbed to the one or more nanoparticles and in that the cross-linkable hydrogel precursor and the one or more nanoparticles don't form a transient shear-thinning and self-healing hydrogel.

The subject matter described herein relates to methods for polymer xanthylation and the xanthylated polymers produced by such methods. Subsequent replacement of the xanthylate moiety allows facile entry into functionalized polymers.

The invention features adhesive devices for holding objects (e.g., bone fragments) fixed with respect to each other.

Provided are a preparing method of a superelastomer, a superelastomer prepared using the same, and a molded article containing the superelastomer, and the superelastomer can be used as a biomaterial replacing soft tissues due to excellent strain at break and elastic recovery.

Techniques regarding the synthesis of polyesters and/or polycarbonates through one or more ring-opening polymerizations conducted within a flow reactor and facilitated by a urea anion catalyst and/or a thiourea catalyst are provided. For example, one or more embodiments can comprise a method, which can comprise polymerizing, via a ring-opening polymerization within a flow reactor, a cyclic monomer in the presence an organocatalyst comprising a urea anion.

Disclosed herein are stereocomplexes for the delivery of one or more anti-cancer agents. The stereocomplexes exhibit low toxicity and are biodegradable while also providing for controlled release of one or more anti-cancer agents at tumor sites. The stereocomplexes can be designed such that the anti-cancer agents operate synergistically and may optionally include additional targeting groups and functionalities. The stereocomplexes disclosed herein can be combined with pharmaceutically-acceptable carriers and/or excipients to form pharmaceutical compositions. By varying the amount of each anti-cancer agent in the stereocomplex, specific types of tumors and cancer cell lines can be treated.

Disclosed is a method for preparing a fully-degradable non-woven fabric by spun-bonding, including: (S1) preparation of a poly(caprolactone-co-lactide acid) (P(CL-co-LA)); (S2) preparation of a copolymerized-modified poly(lactide acid) (PLA); and (S3) preparation of a full-degradable non-woven fabric using a spun-bond method. In this disclosure, the PLA is modified in gradient several times to prepare the full-degradable non-woven fabric in combination with an optimized spun-bonding method.