Fully branched hyperbranched polymers with a focal point: analogous to dendrimers

IMR OpenIR

	Fully branched hyperbranched polymers with a focal point: analogous to dendrimers
	J. Y. Chen; M. Smet; J. C. Zhang; W. K. Shao; X. Li; K. Zhang; Y. Fu; Y. H. Jiao; T. Sun; W. Dehaen; F. C. Liu; E. H. Han
	2014
发表期刊	Polymer Chemistry
ISSN	1759-9954
卷号	5 期号:7 页码:2401-2410
摘要	A fully branched hyperbranched polymer with a focal point has been prepared by superelectrophilic polycondensation of AB(2) monomers with a core with six functional arms (B-6') in a slow addition manner. To reduce the chance of the homopolymerization of the monomers, the acenaphthenequinone group with higher reactivity was chosen as B' for the core and the isatin group with lower reactivity as B in the monomer. The obtained polymers were characterized by H-1 NMR, C-13 NMR, TGA and GPC. The thermo-decomposition temperature of the polymer could reach 400 degrees C. The NMR spectra indicated the 100% branching degree of the hyperbranched polymers and the successful introduction of the core. The proportions of the terminal/dendritic groups in the hyperbranched polymers with low monomer/core feeding ratio were evaluated through NMR and GPC data respectively. Through comparison and analysis it was revealed that most of the hyperbranched polymers possessed quasi-spherical structures. The molecular weights of the hyperbranched polymers increased almost linearly with the feeding ratio of the monomer to the core and the polydispersities of the polymers were greatly influenced by the monomer concentration. At the optimal monomer concentration, the main parts of the GPC curves were symmetric and narrow. Although there were traces of faint shoulder, the molecular weight distributions of the polymers were still acceptable. The branching degree of 100%, controllable molecular weights, narrow distribution, plus the quasi-spherical and hierarchical architectures of cores, dendritic and terminal units made the fully branched polymer with a focal point analogous to dendrimers in all respects, offering a highly efficient option to fabricate dendrimer substitutes.
部门归属	[chen, jun-yi ; zhang, ji-cheng ; shao, wei-kuan ; li, xiang ; zhang, kai ; fu, yu ; sun, ting] northeastern univ, coll sci, shenyang 110819, peoples r china. [jiao, yong-hua] northeastern univ, coll life & hlth sci, shenyang 110819, peoples r china. [smet, mario ; dehaen, wim] katholieke univ leuven, dept chem, b-3001 heverlee, belgium. [liu, fu-chun ; han, en-hou] chinese acad sci, inst met res, state key lab corros & protect, shenyang 110016, peoples r china. ; fu, y (reprint author), northeastern univ, coll sci, shenyang 110819, peoples r china. ; fuyu@mail.neu.edu.cn ; jiaoyh@mail.neu.edu.cn ; sunting@mail.neu.edu.cn
关键词	Molecular-weight Distribution Ring-opening Polymerization Slow Monomer Addition Poly(Arylene Oxindole)s Multibranching Polymerization Dendritic Polyamine Cyclic Carbamate Core 100-percent Polyesters
URL	查看原文
语种	英语
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/72534
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	J. Y. Chen,M. Smet,J. C. Zhang,et al. Fully branched hyperbranched polymers with a focal point: analogous to dendrimers[J]. Polymer Chemistry,2014,5(7):2401-2410.
APA	J. Y. Chen.,M. Smet.,J. C. Zhang.,W. K. Shao.,X. Li.,...&E. H. Han.(2014).Fully branched hyperbranched polymers with a focal point: analogous to dendrimers.Polymer Chemistry,5(7),2401-2410.
MLA	J. Y. Chen,et al."Fully branched hyperbranched polymers with a focal point: analogous to dendrimers".Polymer Chemistry 5.7(2014):2401-2410.