If the monomer units are joined in multiple chains and form interconnections between chains, cross-linked polymers are made. When a cross-linked polymer includes plentiful interconnections between chains in 3D, a network polymer is formed. Sign in to download full-size image Fig. 2. Structures ...
This expression can also be extended by noting that n=M/Mo, where Mo is the monomer molecular weight. Hence (Rg)2 is proportional to the molecular weight, M. In a good solvent, the interactions between the solvent and the polymer are favorable, the chain avoids itself, and the coil ...
A novel substituted phenylacetylene with a pendant betulin derivative group was designed and synthesized successfully, The obtained monomer was further polymerized in an achiral catalytic system, and polymer exhibited a strong Cotton effect at the main-chain absorption regions in the circular dichroism sp...
et al. Photophysics of polymeric carbon nitride: An optical quasimonomer. Phys. Rev. B 87, 205204 (2013). Article CAS Google Scholar Ullah, N., Chen, S., Zhao, Y. & Zhang, R. Photoinduced water–heptazine electron-driven proton transfer: perspective for water splitting with g-C3N4. J...
35 The diagram shows the structure of a monomer used to make a polymer.CH3H2 C =C CH3What is the structure of the polymer? A AB HCH3H CH CH3 CH3CH。CH3I—C-C C一—C CC C—CH3CH3古C DCH3H CH3CH3CH CH。CH3I一C一C CH—C一C CI HCH3CH3H CH3CH3 相关知识点: 试题来源: ...
This technique was discovered by a South Korean chemist and hailed as a cure for smelly socks.(a)(i) Give the full structural formul a of the monomer that is used to make polymer A. [1](ii) Suggest the name of polymer A.[1(ii) The monomer in a(i) reacts with aqueous bromine....
Systems formed by crystalline monomer and polymer can be characterized by their phase diagram. From the view point of the composition, this diagram can be divided into two main parts at a certain ratio designated here as Mkr. At polymer contents higher than Mkr, the system shows the behavior ...
The diagrams contain a eutectic point that corresponds to the situation when the crystallization of TeCB out of its solution in a polyolefin is accompanied by the crystallization of monomer units of the macromolecules. As a result, the polymer acquires a gel structure with crystallites as ...
as well as theG-C3-Pyr system. The composition and wavelength both significantly change with temperature. This is thought to be due to differing energy transfer rates between the doped dyes and changes in theG-C3-Pyr monomer/excimer ratio. Such significant changes in emission wavelength are not...
Subsequently, they developed a two-phase model to describe the time-dependent behavior through the ratio of excimer and monomer fluorescence intensity, Ie/Im, and to determine the concentrations of mixed phases such as PS-rich and PS-poor. Their model requires simultaneous measurement of excimer ...