Solution properties of comb-like polymers consisting of dimethylsiloxane monomer units

Abstract

The increase in the rigidity of comb‐like polydimethylsiloxanes with increasing side‐chain length begins when the side chain contains more than five valent bonds.

Amphiphilic Molecular Brushes with Regular Polydimethylsiloxane Backbone and Poly-2-isopropyl-2-oxazoline Side Chains. 3. Influence of Grafting Density on Behavior in Organic and Aqueous Solutions

“…This behavior is explained by the difference in the refractive indexes of the PiPrOx and PDMS. For macroinitiators, the value of the partial specific volume is smaller than the for linear PDMS and close to = 0.97 cm 3 g −1 for comb-like PDMS with short side chains [ 49 ]. The grafting of side PiPrOx chains leads to a decrease in .…”

Loose Semirigid Aromatic Polyester Bottle Brushes at Poly(2-isopropyl-2-oxazoline) Side Chains of Various Lengths: Behavior in Solutions and Thermoresponsiveness

“…Research into molecular brushes began at the end of the 20th century due to the development of controlled synthesis of polymers of various architectures [2,3,12,13]. As a result, the main regularities of the behavior of graft copolymers in solutions, such as the effect of the length of the main and side chains and the grafting density of the latter, on the hydrodynamic characteristics and conformation of their macromolecules have been established [5][6][7][8][9][14][15][16][17][18][19][20].…”

Thermoresponsive Molecular Brushes with a Rigid-Chain Aromatic Polyester Backbone and Poly-2-alkyl-2-oxazoline Side Chains

“…An increase in equilibrium rigidity is facilitated by chain conjugation, such as, for example, in polyisocyanates, and specific non-covalent interactions, such as in DNA and polysaccharides [16][17][18][19][20][21]. In macromolecules with a comb-like structure, increased rigidity is induced by steric obstacles arising between the side chains, which impede the bending and folding of the main chain as a result of intramolecular thermal movement of the units [11,22,23].…”

“…Research on comb-like polymers, or more precisely, molecular brushes, intensified at the end of the 20th century, when new synthetic approaches were developed that allowed the controlled synthesis of high-molecular compounds of various architectures [24][25][26][27][28][29]. As a result, the main regularities of the behavior of graft copolymers in solutions were established; in particular, the influence of the size of the main and side chains, as well as the grafting density of the latter, on the hydrodynamic characteristics and conformation of comb-like macromolecules was revealed [23,[30][31][32][33][34][35][36][37][38][39]. In the formation of properties in solutions of amphiphilic comb-shaped macromolecules, in which the chemical nature of the main and side chains is very different, the affinity to the solvent of various blocks of the graft copolymer is of great importance [40][41][42][43][44][45].…”