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
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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
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发表时间:
2022
期刊:
影响因子:
2.3
通讯作者:
Matsushita Yushu
中科院分区:
文献类型:
--
作者:
Doi Yuya;Takano Atsushi;Takahashi Yoshiaki;Matsushita Yushu
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
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DOI:
--
发表时间:
2020
期刊:
影响因子:
--
作者:
D. Tsalikis;V. Mavrantzas
通讯作者:
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影响因子:
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作者:
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Smith, Douglas E.
DOI:
10.1103/physreve.77.011801
发表时间:
2008
期刊:
Physical review. E, Statistical, nonlinear, and soft matter physics
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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