Fig. 1.Schematic representation of the main methods to synthesize SIPN/IPN. M: monomer; C: crosslinker; P: polymer. In the last years, the number of research referring to IPN and SIPN systems has considerably increased, especially with a focus on biological applications [18–21]. In this...
The dependence of properties of the polymer solution on the total monomer concentration, on interactions between the walls and the monomers, and on the relation between the polymerization index and the distance between walls is considered. The phase diagram of the solution was obtained....
For instance, the polymer chains with a low grafting density form a “mushroom” conformation when monomer–solvent interactions prevail over monomer–substrate interactions, whereas strong interactions with the surface and a “bad solvent” condition can promote a flat “pancake” conformation. On the...
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...
Let us mention that NF membranes use different types of aqueous phase monomer such as piperazine (PIP). Another emerging type of membrane consists of ordered polymer films containing nanochannels and nanoporous polymer materials with 3D-interconnected structures formed via the direct cross-linking of ...
Beside the temperatureT, this model is described by (i) a curvature energy εh, representing the stiffness of the chain; (ii) a nearest‐neighbor attractive energy εv, representing the solvent; and (iii) the monomer density ρ=N/Ω, whereNand Ω denote, respectively, the number of ...
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 ...
First, a poly(amic acid) (PAA) solution was prepared by dissolving the ODA monomer in N,N-dimethyl-acetamide (DMAc). An equimolar amount of PMDA was then added stepwise to the ODA-DMAc solution to ensure complete dissolution, and was stirred for 12 h to yield a PAA solution. ...
Besides the monomer used and the way in which it has been polymerized, the molecular weight and the molecular weight distribution of the polymer obtained are important factors that determine its properties. 6.2.1.2 Polymer and Copolymer Properties The nature of the monomer(s) used to prepare the...
10.1.1Networks and Network Materials A polymer network material consists of a network macromolecule or an assembly of interacting macromolecules of an extent limited only by the macroscopic dimensions of the sample of material. A network may be formed by the reaction of monomer or prepolymer molecule...