Such polymeric additives often improve the physical properties of rubber compositions. ![]() Rubbers may be modified by the addition of various polymer compositions. Moreover, achieving better control over the surface composition and/or the internal composition of polymeric nanoparticles also is desirable. However, controlling the size of nanoparticles during polymerization, the surface characteristics, and/or the internal composition of such nanoparticles can be difficult. Nanoparticles may be monodisperse in size and uniform in shape. Nanoparticles can be discrete particles uniformly dispersed throughout a host composition. Similarly, vinyl aromatic (e.g., polystyrene) microparticles have been prepared for uses as a reference standard in the calibration of various instruments, in medical research, and in medical diagnostic tests. Polymeric nanoparticles have attracted increased attention over the past several years in a variety of fields including catalysis, combinatorial chemistry, protein supports, magnets, and photonic crystals. 1b also depicts some interaction between nanoparticles at their shell regions. The nanoparticles may interact or connect with each other at their shell regions. Such nanoparticles lead to unexpectedly improved physical properties when the interacting nanoparticles are compounded into a rubber composition. 1b depicts an embodiment in the which the nanoparticles are comprised of a styrene/divinylbenzene core, a relatively narrow polystyrene interphase region, and a butadiene/styrene shell in the form of brushes. 1b is an illustration of several spherical-shaped nanoparticles interacting and attached to each other at their interphase regions. The core region and the shell region may each have one or more layers.įIG. Its tensile at break, and especially its elongation at break, far exceeded those for the control compound,” which contained no polymeric nanoparticles and instead contained 50 phr of conventional reinforcing carbon black.Ī core/shell configuration refers generally to a polymeric nanoparticle with at least two defined regions, in which one region (called herein the core) is substantially surrounded by another region (called herein the shell). Patent Application 20100004398,īridgestone’s polymeric nanoparticles with at least one interphase region exhibit “unexpected super-elasticity. ![]() The size, composition, and/or configuration of the interphase region may be varied to achieve desired physical and/or chemical properties of the resulting polymeric nanoparticles, and of the compositions into which the nanoparticles are compounded, according to inventors Xiaorong Wang, Georg Bohm, Sandra Warren, Xiao-Dong Pan and James E. The interphase region is from about 1 nm to about 100 nm. The mean average diameter of the polymer nanoparticles may be less than about 250 nanometers (nm). The inventive interphase polymeric nanoparticles “exhibit unexpectedly better storage modulus and well as loss modulus than the control with carbon black particles.”īridgestone Americas’ nanoparticles may be of a core/shell configuration with an interphase region connecting the core and the shell. A key use for polymeric nanoparticle rubber compounds is tire rubber formulations to make tire treads and side walls. 10 is an atomic force micrograph of Bridgestone Americas’ new polymeric interphase nanoparticles. To see how Klean Industries is changing material science within the tire and rubber related formulation industry with environmentally friendly, cost effective nano technologies please click here. ![]() The resulting rubber compounds with added polymeric interphase nanoparticles exhibit superior strength, hardness, improved tensile and tear strength as well as barrier qualities compared to rubber and plastic compounds filled with carbon black fillers. ![]() Patent Application 20100004398, Bridgestone details nanoparticles for use as filler in rubber and plastic compounds. Bridgestone Americas (Akron, OH) reveals new polymeric interphase nanoparticles that represent a potential threat to the 8 million ton per year carbon black market.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |