摘要:
[Object] An object of the present invention is to provide a novel artificial slime-like polymer material capable of controlling flow characteristics without changing a chemical composition such as a main chain skeleton or a solvent constituting the polymer material. [Solution] It is found that a slime-like polymer material in which liquid-liquid phase separation is induced can be provided and fluidity of the polymer material can be controlled by adding a polymer that does not react with a polymer unit serving as a basic skeleton constituting the polymer material in addition to the polymer unit.
摘要:
A vulcanizable rubber composition comprises an interpenetrating or ionic network (IPN)-promoting resin. The resin comprises side chain functional groups along the resin backbone, which, in the presence of an additive material, form the connections that make up the IPN. In one embodiment, such material is ZnO. A method for forming the rubber composition comprises, in a productive step, mixing the product of the non-productive step, the zinc oxide, and a resin derived from maleic anhydride. The zinc oxide and the resin are simultaneously added to the composition during the productive mixing stage. The rubber composition can be cured and incorporated in a tire component, such as, a tread.
摘要:
A resin composition according to an aspect of the present invention comprises: an ethylene-vinyl alcohol copolymer (A); and a block copolymer (B) having a block (b1) that includes a vinyl aromatic monomer unit, and a block (b2) that includes an isobutylene unit, wherein the ethylene-vinyl alcohol copolymer (A) and the block copolymer (B) form a co-continuous phase structure; and a DSC curve obtained following heating the resin composition up to a melting point and cooling at a rate of 50° C./min in a differential scanning calorimetry analysis shows two peaks, with a higher peak top temperature falling within a range of 130° C. or greater and 170° C. or less, and a lower peak top temperature falling within a range of 100° C. or greater and less than 130° C. A resin composition may thus be obtained that is able to give a molded article that is superior in balance between gas barrier properties and flexibility.
摘要:
Embodiments herein are directed to moisturizing compositions comprising interpenetrating polymer networks, methods of making moisturizing compositions and methods of using moisturizing compositions.
摘要:
The present disclosure discloses a triple-responsive starch-based microgel and a preparation method thereof. The present disclosure prepares C6 oxidized starch and PNIPAM semi-interpenetrating network microgel, namely the triple-responsive starch-based microgel, mainly with pH sensitive C6 oxidized starch and temperature sensitive NIPAM (N-isopropylacrylamide) as raw materials, and using an inverse emulsion polymerization method. The triple-responsive starch-based microgel according to the present disclosure is a spherical particle with the particle diameter of 15-25 μm, has pH, temperature and ionic strength-sensitivity, good biocompatibility and biodegradability, and can be widely used in the fields of nutrient protection, controlled drug release, protein separation and purification and the like. Meanwhile, its preparation process is simple and controllable with mild reaction conditions, and is suitable for large-scale production.
摘要:
Provided herein are methods comprising the use of a macroinitiator and application protocols to apply a hydrophilic coating to latex, or natural rubber, and compositions resulting from such methods. This coating results in e.g., an increased sense of lubrication when in contact with water or an aqueous solution.
摘要:
An alginate-polyacrylamide IPN hydrogel formulation for 3D printing using a dual syringe system where the components that initiate polymerization of each network remain separated until printing. The dual syringe system may use a single motor and mixing head to combine both parts of the hydrogel formulation for controlled polymerization of the material. The elastic and time-dependent viscoelastic properties (stress relaxation) are tuned to match mammalian tissues by changing the crosslink density and monomer concentration. The fracture energy of the material may be increased by soaking in a calcium chloride solution. The resulting IPN polymer material may find application in soft tissue medical simulation devices, particularly because the mechanical properties may be tuned to mimic the elastic and viscoelastic properties of muscle tissue and may be 3D printed in the shape of anatomical parts.
摘要:
The present invention relates to the synthesis of porous polymer scaffold from polyethyleneglycol-polyurethane having castor oil linkages under controlled conditions and their use as stem cell delivery vehicles thereby accelerating the tissue regeneration process. The present invention further studies the biodegradability, stability and biocompatibility of porous polymer scaffolds in varios cell lines and primary bone marrow stem cells. Particularly the present invention further relates to the physio-chemical characterization of the porous polymer scaffolds.
摘要:
The invention features a composition comprising a self-healing interpenetrating network hydrogel comprising a first network and a second network. The first network comprises covalent crosslinks and the second network comprises ionic or physical crosslinks. For example, the first network comprises a polyacrylamide polymer and second network comprises an alginate polymer.
摘要:
A coating composition having a measured solids content of at least 95% according to test method ASTM D2369 is disclosed. The composition includes a mixture of (a) a polymer prepared from one or more functional monomers having a (meth)acrylic monomer, an allyl monomer, or combinations thereof each having an ethylenically unsaturated double bond and an additional reactive functional group, and (b) a reactive diluent. At least some of the additional reactive functional group of the functional monomer remains unreacted during formation of the polymer. The reactive diluent has at least one ethylenically unsaturated functional group, no additional functionality, and a boiling point of greater than 100° C. The ethylenically unsaturated functional group of the reactive diluent and the additional reactive functional group remaining within the polymer do not react. Also disclosed are coatings formed from the cured coating composition and methods for providing sound and vibration damping through a substrate.