The polyamide/EVA blends had dispersed phase
sizes between 0.6 and 2.5 [micro]m and interfacial thickness around 1.8 nm [17, 18].
Key statement: A rubber material A which has a low degree of dynamic spring stiffness, a rubber material B which has a high vibration damping effect, and a vulcanizing agent which is capable of vulcanizing only an unvulcanized mass of the rubber material B are evenly mixed together and heated to vulcanize the rubber so that the formed vibration damping rubber member has an island-sea structure in which fine particles of the vulcanized rubber material B are dispersed as a dispersed phase
in a matrix phase of the vulcanized rubber material A.
Senkler, technical director of engineering polymers for Du Pont, says his firm's major alloying thrust will continue to be functionalizing thermoset rubbers as a dispersed phase
to toughen functionalized nylons and polyesters.
Furthermore, the mechanical properties of PA/PPO blends are also dominated by their morphological structures, in particular, the dispersed phase
morphology, which is strongly influenced by the processing conditions .
The first step in the creation of a formulated dispersion is said to involve combining the dispersed phase
(solid pigment, solid resins, etc.) in a liquid matrix.
A new thermoplastic alloy that pairs nylon 6 as a matrix resin and an unnamed functionalized olefin as the dispersed phase
is debuting in two developmental grades from Akzo Engineering Plastics Inc., Evansville, Ind.
An olefinic copolymer with glycidyl methacrylate as functional groups reduced the domain size of the dispersed phase
and enhanced the tensile properties of the PLA/LDPE blends.
Control of dispersed phase
particle size is critical in obtaining adequate properties when blending for thermoplastic elastomers or rubber-toughened plastics (refs.
He says the firm's recently unveiled TPE 3000 series consists of a PP matrix and a dispersed phase
of butyl rubber, together with proprietary compatibilization technology.
In terms of morphology, the shape and size of the dispersed phase
are vital factors in determining the gas-barrier performances of blends, in addition to the intrinsic barrier properties of each component .
A partially compatible resin provides a dispersed phase
at low concentration, which consists of a blend of resin and low-molecular-weight ends of the polymer.