Insulating polymers are dielectric materials. When a nonpolar polymer is placed in an electric field, there may be an ionic or transient electric current. If there is a barrier to prevent these charges from leaving the surface, the dielectric becomes polarized; that ...
Permeation of water through polar and nonpolar polymers and copolymers: determination of the concentration-dependent diffusion coefficient. Journal of Polymer Science: Part B: Polymer Physics 38, 1998-2008.Marais, S., Nguyen, Q.T., Devallencourt, C., Metayer, M., Nguyen, T.U., and Sch...
Insulators:Nonpolar materials, including certain plastics and polymers, have low electrical conductivity and are used as insulators in electrical and electronic applications. They help prevent the flow of electricity and protect sensitive components from damage. Hydrophobic Coatings:Nonpolar compounds are used...
Polar and nonpolar solubility parameters are presented for a variety of solvents and for several polymers. The calculations are useful for nonpolar systems, polar polymers or polar solvents, or both, but are not reliable for systems where specific interactions (such as hydrogen bonding) are ...
摘要: This review article deals with the rare earth metal initiated polymerization of polar and nonpolar monomers in living fashion (" living" means very active without termination and chain transfer reaction) to give monodisperse high molecular weight polymers at high...
The coordination–insertion random copolymerization of polar and nonpolar olefins holds great potential for the design of new polymers with targeted properties. However, examples of catalysts capable of such polymerization still remain scarce, the majority of which are based on PdII and some also on ...
When added to nonpolar polymers, Exxelor polymer resins enhance adhesion to materials such as metal, thermoset rubbers andmostpolarsubstrates, including glass. exxonmobilchemical.com exxonmobilchemical.com 当加入到非极性聚合物中时,Exxelor聚合物树脂能够提高对包括金属、热固性橡胶和大多数极性基材(包 括玻璃...
There are 3 types of solvents commonly encountered: nonpolar, polar aprotic, and polar protic.(There ain’t such a thing as a non-polar protic solvent). 4. Nonpolar Solvents Have Little To No Dipole Moment These solvents have low dielectric constants (<5) and are not good solvents for cha...
nonpolar dielectrics 非极.曲电介质nonpolar dieleetries由非极性分子组成的电介质。即无外电场时,分子的正、负电荷重心相重合,不具有永久或固有偶极矩。 非极性电介质一般都具有对称的分子结构,呈各向同性的球对称性,可由圆球非旋转对称群cocom或Tco、表示。一些单原子分子(如He、Ne、Ar、Kr和Xe等)、双原子分子...
Metal-Free Fast Azidation by Using Tetrabutylammonium Azide: Effective Synthesis of Alkyl Azides and Well-Defined Azido-End Polymethacrylates green chemistrypolymerssynthesis designAn effective method to synthesize azido-end polymethacrylates from tetrabutylammonium azide (BNN_3) in a nonpolar solvent ......