A remoldable bismaleimide resin and application thereof. The preparation method includes blending 2-allylphenyl glycidyl ether and terephthalic acid in acetonitrile, carrying out an esterification reaction under the condition of quaternary ammonium salt as a catalyst to obtain bis(3-(2-allylphenoxy)-2-hydroxypropyl) terephthalate containing a reversible dynamic group; then uniformly mixing bis(3-(2-allylphenoxy)-2-hydroxypropyl) terephthalate and bismaleimide, curing to obtain the re-moldable bismaleimide resin. The prepared re-moldable bismaleimide resin not only has excellent heat resistance and mechanical properties, but also can be remolded under hot pressing conditions. The preparation method of the re-moldable bismaleimide resin has the advantages of wide raw material sources and simple process, and has a wide application prospect in the fields of aerospace, transportation, electronic information, new energy, insulated electrical industry and the like.

The presently claimed invention is directed to a polyurea-polyetheramine copolymer obtained by reacting at least one polyisocyanate (A) and at least one isocyanate reactive component (B); wherein the at least one polyisocyanate (A) has an NCO functionality of at least ≥2.0; and the at least one isocyanate reactive component (B) is a polyetheramine having at least two secondary amine functional groups and at least one hydroxy functional group.

A shape-memory polymer that is melt-recyclable with high processability and little performance loss, in contrast to known Crosslinked semicrystalline shape-memory networks that are capable of storing large amounts of elastic energy with negligible plastic deformation but as thermosets are not easily melt-processed or recycled. In examples herein, catalyst-free isocyanate chemistry is used to prepare two linear poly(caprolactone)s with bisurea hydrogen bonding groups periodically positioned along the main chain. Compared to an entangled poly(caprolactone) homopolymer of similar molecular weight, the segmented poly(bisurea)s exhibit minimal stress relaxation when elastically strained at identical conditions. Furthermore, the materials' single relaxation times indicate chain reptation, and at sufficient temperatures, disentanglement occurs rapidly enough to perform melt-processing. The polymers show excellent shape fixity and recovery before and after shredding, melt-pressing, and annealing into a reprocessed film.

Very soft, launderable polyurethane foams for pillow and other bedding applications are made using a quasi-prepolymer of diphenylmethane diisocyanate and a polyether polyol having a high oxyethylene content. The quasi-prepolymer is reacted with isocyanate-reactive components that include a certain monoalcohol but is devoid of or nearly devoid of a polyether polyol having a high oxyethylene content.

An embodiment includes a polymer composition comprising a thermoplastic polymer that: (a) is bonded to iodine, (b) includes a vinyl group, and (c) includes urethane linkages. Other embodiments are described herein.

Cosmetic compositions, systems and methods for conferring responsive durable shaping of keratinous fibers employ at least one shape memory polymer that includes a three-armed branched polyethylene glycol (PEG) based polymer that is functionalized with one or more metal-coordination active groups. The shape memory polymer forms a crosslinked network coating on a substrate, for example a substrate selected from keratinous substrates, for example, hair. Hair coated with the shape memory polymer and treated with an oxidizing agent can be shaped, locked into shape, and reprogrammed by modulation of pH. The coated hair retains durable shaping properties through at least one shampoo treatment. The cosmetic compositions, systems and methods provide durable and reprogrammable durable shaping of the keratinous substrate, for example for styling hair.

The presently claimed invention is directed to a polyurea copolymer obtained by reacting an isocyanate mixture and at least one at least one secondary amine having at least two amine functionalities; wherein the isocyanate mixture (A) has an average NCO functionality of ≥2.10.

The invention discloses a remoldable shape memory bismaleimide resin and its application. The preparation method includes blending 2-allylphenyl glycidyl ether and adipic acid in acetonitrile, carrying out an esterification reaction under the condition of quaternary ammonium salt as a catalyst to obtain bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate containing a reversible dynamic group; then uniformly mixing bis(3-(2-allylphenoxy)-2-hydroxypropyl)adipate and bismaleimide, curing to obtain the remoldable shape memory bismaleimide resin. The prepared remoldable shape memory bismaleimide resin is not only excellent heat resistance and mechanical properties, but also can be remolded under hot pressing conditions. The preparation method of the remoldable shape memory bismaleimide resin has the advantages of wide raw material sources and simple process, and has a wide application prospect in the fields of aerospace, transportation, electronic information, new energy, insulated electrical industry and the like.

The present disclosure provides compositions which may be used as tissue engineering materials, and more particularly xylitol-doped citrate polymer compositions which may be useful as bone grafts.

Periodic placement of directional dynamic bonding units along a flexible polymer backbone enables the formation of large supramolecular structures during strain. These structures, which form due to the alignment of stretched backbone chains, lock the stretched chains in their elongated state due to the formation of the directional dynamic bonds. Application of an appropriate stimulus (i.e., heat or light) weakens the dynamic bonds and enables the elongated chains to retract, performing measurable work and enabling the use of these structures as polymer actuators. Importantly, the high strength of the dynamic bonds enables a large amount of entropic energy to be stored in the elongated chains, enabling the polymer to achieve a large actuation force during recovery.