Terminal relaxation behavior of entangled linear polymers blended with ring and dumbbell-shaped polymers in melts

Terminal relaxation behavior of entangled linear polymers blended with ring and dumbbell-shaped polymers in melts
复制标题

熔体中与环状和哑铃形聚合物共混的缠结线性聚合物的末端松弛行为

DOI:
10.1007/s00397-022-01355-y
复制
发表时间:
2022
期刊:
影响因子:
2.3
通讯作者:
Matsushita Yushu
Matsushita Yushu
中科院分区:
工程技术3区
文献类型:
--
作者:
Doi Yuya;Takano Atsushi;Takahashi Yoshiaki;Matsushita Yushu

文献摘要

参考文献

相似文献

我们研究了缠结线性聚苯乙烯L430(缠结数Z=M/Me≃ 24,其中M是分子量,Me是缠结分子量)与环R30(MR≃ 1.8Me)和哑铃形D308030(MR≃ 1.8Me和ML≃ 4.7Me)聚合物共混的末端弛豫行为。与不同分子量的二元线性聚合物共混物不同,L430/R30 共混物表现出一步松弛。 L430/R30共混物的零剪切粘度η0略低于纯L430。这些结果表明,线性链自发渗透到环中,但环不充当缠结交联剂。 L430/D308030 共混物也表现出一步弛豫,但其末端弛豫比 L430 更慢且更宽。这个结果可能是因为D308030中的两个环段被线性链穿透,因此D308030充当具有较长特征时间的伪纠缠点。图形摘要
We investigated the terminal relaxation behavior of entangled linear polystyrene L430 (with the entanglement numberZ=M/Me≃ 24, whereMis the molecular weight andMeis the entanglement molecular weight) blended with ring R30 (MR≃ 1.8Me) and dumbbell-shaped D308030 (MR≃ 1.8MeandML≃ 4.7Me) polymers. The L430/R30 blend exhibits a one-step relaxation unlike binary linear polymer blends with different molecular weights. The zero-shear viscosityη0of the L430/R30 blend is slightly lower than that of the neat L430. These results suggest that spontaneous penetration of the linear chains into the rings occurs, but the rings do not act as entanglement cross-linkers. The L430/D308030 blend also exhibits a one-step relaxation, but its terminal relaxation is slower and broader than that for L430. This result is probably because two ring sections in D308030 are penetrated by the linear chains, and hence D308030 acts as a pseudo-entanglement point with longer characteristic time.Graphical abstract
线性聚合物基体中聚合物环的尺寸和扩散率:螺纹事件的关键作用
DOI: --
发表时间: 2020
期刊:
影响因子: --
作者:
D. Tsalikis;V. Mavrantzas
通讯作者: V. Mavrantzas
DOI: 10.1021/ma070051h
发表时间: 2007-05-01
期刊: MACROMOLECULES
影响因子: 5.5
作者:
Robertson, Rae M.;Smith, Douglas E.
通讯作者: Smith, Douglas E.
环状和线性聚合物熔体共混物的构象特性。
DOI: 10.1103/physreve.77.011801
发表时间: 2008
期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子: --
作者:
G. Subramanian;S. Shanbhag
通讯作者: S. Shanbhag
DOI: 10.1016/j.polymer.2016.10.037
发表时间: 2016
期刊: Polymer
影响因子: 4.6
作者:
Y. Doi;A. Takano;Y. Matsushita
通讯作者: Y. Matsushita
本体和溶液中哑铃形聚苯乙烯的粘弹性
DOI: --
发表时间: 2021
期刊:
影响因子: --
作者:
Y. Doi;A. Takano;Yoshiaki Takahashi;Y. Matsushita
通讯作者: Y. Matsushita