Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (8): 1098-1106.DOI: 10.19894/j.issn.1000-0518.240050
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Zong-Hao HONG1,2, Shi-Long WU1(), Quan CHEN1,2()
Received:
2024-02-07
Accepted:
2024-06-14
Published:
2024-08-01
Online:
2024-08-27
Contact:
Shi-Long WU,Quan CHEN
About author:
slwu@ciac.ac.cnSupported by:
CLC Number:
Zong-Hao HONG, Shi-Long WU, Quan CHEN. Nonlinear Elongational Rheology of Unentangled Poly(styrene-co-p-tert butyl styrene) Copolymers[J]. Chinese Journal of Applied Chemistry, 2024, 41(8): 1098-1106.
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URL: http://yyhx.ciac.jl.cn/EN/10.19894/j.issn.1000-0518.240050
Samples | fPtBS/% | Mn/(kg·mol-1) | Mw/(kg·mol-1) | PDI | Tg/℃ | nK | τR /s |
---|---|---|---|---|---|---|---|
PS | 0 | 19 | 24 | 1.26 | 102 | 26 | 0.001 |
PS7-PtBS3 | 35 | 23 | 29 | 1.26 | 115 | 27 | 0.008 |
PS5-PtBS5 | 54 | 29 | 35 | 1.22 | 123 | 30 | 0.09 |
PS3-PtBS7 | 74 | 38 | 49 | 1.29 | 132 | 37 | 0.63 |
PtBS | 100 | 38 | 46 | 1.21 | 145 | 30 | 9.42 |
Table 1 Important parameters of the samples
Samples | fPtBS/% | Mn/(kg·mol-1) | Mw/(kg·mol-1) | PDI | Tg/℃ | nK | τR /s |
---|---|---|---|---|---|---|---|
PS | 0 | 19 | 24 | 1.26 | 102 | 26 | 0.001 |
PS7-PtBS3 | 35 | 23 | 29 | 1.26 | 115 | 27 | 0.008 |
PS5-PtBS5 | 54 | 29 | 35 | 1.22 | 123 | 30 | 0.09 |
PS3-PtBS7 | 74 | 38 | 49 | 1.29 | 132 | 37 | 0.63 |
PtBS | 100 | 38 | 46 | 1.21 | 145 | 30 | 9.42 |
Fig.4 LVE bTG'(diamond symbol) and bTG"(square symbol) master curves of the PS, PtBS, and their copolymer samples reduced at Tr=170 ℃ (wherein bTG' and bTG" are plotted against reduced frequency ωaT, the solid curves are fits to Eqs (1) and (2))
Fig.5 Comparison of normalized LVE master curves of the PS, PtBS, and their copolymer samples reduced at Tr=170 ℃, wherein G'Mw/ρRT and G"Mw/ρRT are plotted against reduced frequency ωτ, and G0=ρRT/Mw. The solid curves are fits to Eqs (3) and (4)
Fig.7 (A) Plots of normalized steady-state viscosity ηE/ηE,0 against Wi for PS, PtBS, and their copolymers; (B) Plots of ηE/ηE,peak against normalized Weissenberg number Wi/Wipeak, wherein ηE,peak and Wipeak are the viscosity and Weissenberg number at the peak of ηE+,respectively
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