Synthesis, Characterization, and Biological Interaction of Glyconanoparticles with Controlled Branching
摘要:
Branched amphiphilic copolymers were synthesized through the reversible additionfragmentation chain transfer (RAFT) chain extension of a poly(methyl acrylate) macro-chain transfer agent using a protected galactose monomer and a polymerizable chain transfer agent branching unit. After galactose deprotection, the copolymers were self-assembled via nanoprecipitation. The resultant nanoparticles were analyzed for their size, shape, and biological interaction with a galactose binding lectin. Using light scattering, the nanoparticles were determined to be solid spheres. Nanoparticles containing branched glycoblocks bound significantly more lectin than those containing comparable linear blocks. By adjusting the molecular weight and branching of the copolymer, the size of the self-assembled nanoparticle and the saccharide density on its surface can be varied.
SET-LRP from Programmed Difunctional Initiators Encoded with Double Single-Cleavage and Double Dual-Cleavage Groups
作者:Adrian Moreno、Juan C. Ronda、Virginia Cádiz、Marina Galià、Gerard Lligadas、Virgil Percec
DOI:10.1021/acs.biomac.9b00892
日期:2019.8.12
represents a general strategy to prepare mid-chain-degradable vinylicpolymers. Here, we present a series of α-haloester-type programmed initiators encoding multiple single-type and dual-type cleavable junctions. Multiple single-cleavage groups increase the cleavage rate, whereas double-dual sites provide access to multiple mechanisms for cleavage. Single-electron transfer living radical polymerization was
Synthesis and self-assembly of novel amphiphilic copolymers poly(lactic acid)-<i>block</i>
-poly(ascorbyl acrylate)
作者:Yanzhai Wang、Junjiao Yang、Jing Yang
DOI:10.1002/pola.24840
日期:2011.9.15
In this study, a novel type of amphiphilic block copolymerspoly(lacticacid)‐block‐poly(ascorbylacrylate) (PLA‐block‐PAAA) with biodegradable poly(lacticacid) as hydrophobic block and poly(ascorbylacrylate) (PAAA) as hydrophilic block was successfully developed by a combination of ring‐opening polymerization and atom transfer radical polymerization, followed by hydrogenation under normal pressure
One-pot synthesis of poly(N-vinylcaprolactam)-based biocompatible block copolymers using a dual initiator for ROP and RAFT polymerization
作者:Young Chang Yu、Guoxue Li、Jinsang Kim、Ji Ho Youk
DOI:10.1016/j.polymer.2013.09.013
日期:2013.10
Thermosensitive, biocompatible poly(ε-caprolactone)-b-poly(N-vinylcaprolactam) (PCL-b-PVCL), poly(δ-valerolactone)-b-PVCL, and poly(trimethylene carbonate)-b-PVCL block copolymers were synthesized at 30 °C using a hydroxyl-functionalized xanthate reversible addition-fragmentation chain transfer (RAFT) agent, 2-hydroxyethyl 2-(ethoxycarbonothioylthio)propanoate (HECP), as a dual initiator for ring-opening
具有生物相容性的热敏聚(ε-己内酯)-b-聚(N-乙烯基己内酰胺)(PCL- b -PVCL),聚(δ-戊内酯)-b -PVCL和聚(碳酸三亚甲基酯)-b-PVCL嵌段共聚物是在30°C下使用羟基官能化的黄药可逆加成-断裂链转移(RAFT)试剂2-羟乙基2-(乙氧基碳硫代硫基硫代)丙酸酯(HECP)作为开环聚合的双引发剂合成的(一锅法(ROP)和RAFT聚合。首先使用磷酸二苯酯(DPP)作为催化剂,通过环化单体的ROP合成疏水嵌段,然后在PVCL嵌段的RAFT聚合反应中加入N-乙烯基己内酰胺(VCL)和2,2'-偶氮双(4-甲氧基-2,4-二甲基戊腈)(V-70)作为反应混合物的引发剂。这种新颖的一锅法是合成基于PVCL的生物相容性嵌段共聚物的便捷而有效的方法。通过控制嵌段共聚物的疏水性,可以轻松地调节基于PVCL的生物相容性嵌段共聚物的较低临界溶液温度(LCST)。通过RAFT共聚将亲水
One‐step synthesis of poly(
<i>N</i>
‐vinylpyrrolidone)‐
<i>b</i>
‐poly(
<scp>l</scp>
‐lactide) block copolymers using a dual initiator for RAFT polymerization and ROP
作者:Sang Jin Shin、Young Chang Yu、Ja Deok Seo、Sung Ju Cho、Ji Ho Youk
DOI:10.1002/pola.27160
日期:2014.6
biocompatible poly(N‐vinylpyrrolidone)‐b‐poly(l‐lactide) (PVP‐b‐PLLA) blockpolymers were synthesized at 60 °C using a hydroxyl‐functionalized N,N‐diphenyldithiocarbamate reversible addition–fragmentation chain transfer (RAFT) agent, 2‐hydroxyethyl 2‐(N,N‐diphenylcarbamothioylthio)propanoate (HDPCP), as a dualinitiator for RAFTpolymerization and ring‐opening polymerization (ROP) in a one‐step procedure
Poly(vinylacetate)-b-polystyrene, poly(vinylacetate)-b-poly(methylacrylate) and poly(vinylacetate)-b-poly(methyl methacrylate) block copolymers with low polydispersity (M(w)/M(n) < 1.25) were prepared by successive reversible addition-fragmentation chain transfer (RAFT) polymerization and atom transfer radical polymerization (ATRP) employing a bromoxanthate iniferter (initiator-transfer agent-terminator)