成人做爰免费视频免费看_成人a级高清视频在线观看,成人a大片在线观看,成人a大片高清在线观看,成人av在线播放,一a一级片,一级黄 中国色 片,一级黄 色蝶 片,一级黄色 片生活片

文獻名：Reversible Addition?Fragmentation Chain-Transfer Polymerization of Amphiphilic Polycarboxybetaines and Their Molecular Interactions 

 

作者：Munziya Abutalip†‡, Anam Mahmood†, Raikhan Rakhmetullayeva ‡, Alexey Shakhvorostov¶♀Yerbol Dauletov, Sarkyt Kudaibergenov¶♀, and Nurxat Nuraje†

†Department of Chemical Engineering, Texas Tech University, Lubbock, Texas 79409

‡Department of Chemistry and Chemical Technology, al-Farabi Kazakh National University,

Almaty, Kazakhstan

¶Laboratory of Engineering Profile, K.I. Satpayev Kazakh National Research Technical

University, Almaty, Kazakhstan

♀Institute of Polymer Materials and Technology, Almaty, Kazakhstan

 

摘要：In this work, we report the first molecular weight-controlled amphiphilic polybetaine synthesis using various hydrocarbons via reversible addition?fragmentation chain-transfer (RAFT) polymerization. The experimental separation of the alkyl aminocrotonate tautomers, which has been the subject of debate, was completed for the first time. The enamine form of these tautomers was further used as a monomer for the RAFT polymerization of amphiphilic polycarboxybetaines. Self-assembly of the amphiphilic polycarboxybetaines showed micelle structures from spherical, rod-like to fractal in the aqueous media due to the competition between both electrostatic and hydrophobic forces. Hydrophobically dominant interactions among amphiphilic polycarboxybetaines and long-chain hydrocarbon alkane molecules were investigated to understand long-chain hydrocarbon alkane crystallization using alkane crystal deposition and viscosity experiments. Strong hydrophobic forces between poly(hexadecyl-grafted aminocrotonate?methacrylic acid) and long-chain hydrocarbon alkane molecules changed the surface properties of the long-chain hydrocarbon alkane nucleus and inhibited the growth of paraffin crystals.