4072-77-9Relevant academic research and scientific papers
A new family of thermo-responsive polymers based on poly[N-(4-vinylbenzyl)- N, N-dialkylamine]
Dan, Meihan,Su, Yang,Xiao, Xin,Li, Shentong,Zhang, Wangqing
, p. 3137 - 3146 (2013)
A new family of the thermo-responsive polymers based on poly[N-(4-vinylbenzyl)-N,N-dialkylamine] with the pendent amine group as well as the doubly thermo-responsive triblock copolymer were synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. These polymers showed the lower critical solution temperature (LCST) and/or the upper critical solution temperature (UCST) in alcohol and in the alcohol/water mixture. The polymer molecular weight, the polymer concentration, the cosolvent/nonsolvent and the deuterated solvent affecting the LCST and/or UCST were investigated, and their great influence on the LCST/UCST was demonstrated. The origin of the phase transition of poly[N-(4-vinylbenzyl)-N,N-dialkylamine] at LCST upon heating was investigated and the possible reason was proposed. The doubly thermo-responsive triblock copolymer of PVMA53-b-PVEA 108-b-PVMA53 underwent phase transition at two LCST temperatures. The PVEA108 block underwent the initial phase transition at the first LCST of 32.5 C to form core-corona micelles, and then the subsequent phase transition of the PVMA53 block took place at the second LCST of 54.5 C to produce corona-collapsed micelles. The proposed polymers based on poly[N-(4-vinylbenzyl)-N,N-dialkylamine] are anticipated to broaden the thermo-responsive polymer range and will be useful in polymer science.
One-stage synthesis of cagelike porous polymeric microspheres and application as catalyst scaffold of pd nanoparticles
Xu, Jianxiong,Chen, Guojun,Yan, Rui,Wang, Da,Zhang, Minchao,Zhang, Wangqing,Sun, Pingchuan
, p. 3730 - 3738 (2011)
One-stage synthesis of cagelike porous polymeric microspheres and their application as catalyst scaffold of Pd nanoparticles are discussed. The synthesis of cagelike porous polymeric microspheres is achieved by W/O/W emulsion polymerization of a surfactan
