Cationic homopolymer model networks and star polymers: synthesis by group transfer polymerization and characterization of the aqueous degree of swelling

Synthesis and characterization of the swelling and mechanical properties of amphiphilic ionizable model co-networks containing n-butyl methacrylate hydrophobic blocks

“…This low sol fraction indicates that the amount of EGDMA cross-linker used with respect to the MTSMC initiator (molar ratio 8 : 1) was sufficient to effect satisfactory interlinking of the polymer chain ends, as already shown by our group in previous studies. 34 The highest sol fraction (15.2%) was obtained for the randomly cross-linked statistical copolymer co-network suggesting that the random interconnection of the polymer chains resulted in lower chain interlinking. By examining the BuMA-b-DMAEMAb-BuMA-based co-networks (Gel 41, 42, 43, 47 and 48), as the overall chain length increased, the percentage of extractables also increased (2.6-8.0%) because of the lower cross-link density in the co-network with longer elastic chains.…”

“…The amount of the EGDMA cross-linker used was eight times the number of moles of the MTSMC initiator, as determined in preliminary investigations in which the synthesis of DMAEMA star homopolymers, with the use of a monofunctional initiator, was optimized. 34 Co-networks of different compositions were prepared by varying the relative amounts of the two co-monomers while co-networks of different architecture were obtained by varying the order of addition of the reagents. The addition sequences followed for the preparation of the four different co-network architectures are shown in Fig.…”

Preparation of pH-sensitive polyacrylic acid hollow microspheres and their release properties

“…As a kind of functional polymers, the pH-sensitive polymers have been studied extensively. 28,[44][45][46] The morphologies of PAA hollow microspheres at pH 2, 5, 6 and 9 were investigated by confocal microscopy, as shown in Fig. 5.…”

Amphiphilic Conetworks Based on End‐Linked Multiblock Copolymers of Different Numbers of Blocks and Constant Molecular Weight and Composition

“…All the linear copolymers between cross‐links (the so‐called “elastic chains”) to the conetworks had overall degrees of polymerization equal to 48 and contained 17 mol‐% BuMA. The EGDMA cross‐linker to the MTSCH initiator molar ratio was 8–1, in order to optimize the end‐linking of the chains 14. A typical synthetic procedure resulting in the conetwork based on the BuMA 4 ‐ b ‐DMAEMA 40 ‐ b ‐BuMA 4 triblock copolymer is described in detail below.…”