Synthesis and linear rheological property of comb-like styrene-based polymers with a high degree of branch chain
Synthesis and linear rheological property of comb-like styrene-based polymers with a high degree of branch chain
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高支链梳状苯乙烯基聚合物的合成及线性流变性能
DOI：
10.1016/j.polymer.2015.01.020
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发表时间：
2015-02
期刊：
影响因子：
4.6
通讯作者：
Xu Donghua
中科院分区：
文献类型：
--
作者：
Lin Yichao;Zheng Jun;Yao Kun;Tan Haiying;Zhang Guangchun;Gong Jiang;Tang Tao;Xu Donghua
以苯乙烯（St）与4-（乙烯基苯基）-1-丁烯（VSt）的碘化共聚物（PSVSI，主链）和活性聚苯乙烯锂（PSLi，侧链）为原料，通过亲核取代反应合成了一系列具有高支化度的梳状聚合物（PSVS-g-PS）。该方法是一种基于活性阴离子聚合和锆氢化反应的接枝共聚物模块化合成的简便方法。PSVS-g-PS的支化密度（每100个重复主链单元的分支链的数目）在2.4至20.7%的范围内。PSVS-g-PS的主链长度大于PS的缠结分子量（Me），而分支链的分子量被设计为低于或高于PS的Me。PSVS-g-PS的线性流变性能研究结果表明，PSVS-g-PS的线性流变性能呈现分级松弛过程。一个出现在中间角频率区域，对应于侧链的松弛。另一个是在末端区域，这与整个梳形聚合物的运动有关。从PSVS-g-PS的零剪切粘度（η0）与相对分子质量的标度关系可以看出，PSVS-g-PS的动力学行为与聚大分子单体和缠结线性聚合物链的动力学行为不同，表明PSVS-g-PS与长分支链之间存在一定的缠结。
A series of model comb-like polymers (PSVS-g-PS) with high branching degree were synthesized by nucleophilic substitution reaction between iodinated copolymer of styrene (St) with 4-(vinylphenyl)-1-butene (VSt) (PSVSI, backbone) and living polystyrene lithium (PSLi, side chain). This method is a facile way for modular synthesis of graft copolymers based on living anionic polymerization and hydrozirconation reaction. The branching density of PSVS-g-PS (the number of branch chain per 100 repeat backbone units) ranged from 2.4 to 20.7%. The backbone length of PSVS-g-PS was larger than the entanglement molecular weight (Me) of PS, while the molecular weight of branch chain was designed to be below or above theMeof PS. The results from the linear rheological properties of the PSVS-g-PS showed hierarchical relaxation process. One appeared in the intermediate angular frequency region, corresponding to the relaxation of the side chain. The other is in the terminal region, which is related to the movement of the whole comb polymer. From scaling law of zero shear viscosity (η0) of PSVS-g-PS with versus molecular weight, it could be seen that the dynamical behavior of PSVS-g-PS was different from those of both poly(macromonomers) and entangled linear polymer chains, indicating that there is certain entanglement for PSVS-g-PS with long branch chain.
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影响因子：
5.5
作者：
Hiroshi Iwawaki;Tadashi Inoue;Yo Nakamura
通讯作者：
Hiroshi Iwawaki;Tadashi Inoue;Yo Nakamura
影响因子：
5.5
作者：
M. Hempenius;Walter Michelberger;M. Möller
通讯作者：
M. Hempenius;Walter Michelberger;M. Möller
分子结构明确的聚丙烯-g-聚苯乙烯和聚丙烯-g-聚丙烯酸正丁酯接枝共聚物的合成及其构效关系
影响因子：
4.6
作者：
Wang Lu;Yang Hongfan;Tan Haiying;Yao Kun;Gong Jiang;Wan Dong;Qiu Jian;Tang Tao
通讯作者：
Tang Tao
DOI：
10.1002/pola.22872
发表时间：
2008-08
期刊：
Journal of Polymer Science Part A
影响因子：
--
作者：
Wei Sun;Fengping Yu;Junpo He;Chaofu Zhang;Yuliang Yang
通讯作者：
Wei Sun;Fengping Yu;Junpo He;Chaofu Zhang;Yuliang Yang
影响因子：
4.6
作者：
S. Namba;Y. Tsukahara;K. Kaeriyama;Kenzo Okamoto;Masaoki Takahashi
通讯作者：
S. Namba;Y. Tsukahara;K. Kaeriyama;Kenzo Okamoto;Masaoki Takahashi