The Relationships Between Different Parameters of Visco-Elastic Testing for Nano-Composites of Butadiene-Isoprene Copolymers

doi:10.19894/j.issn.1000-0518.240363

Chinese Journal of Applied Chemistry ›› 2025, Vol. 42 ›› Issue (5): 684-692.DOI: 10.19894/j.issn.1000-0518.240363

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The Relationships Between Different Parameters of Visco-Elastic Testing for Nano-Composites of Butadiene-Isoprene Copolymers

Tian-Yi ZHOU¹, Xiao-Hu ZHANG², Guang-Li HU², San-Rong LIU³, Ji-Fu BI²^,³()

^1.School of Materials Science and Engineering，East China University of Science and Technology，Shanghai 200237，China
^2.Huangpu Institute of Materials，Center for Aircraft Tire Science，Guangzhou 510700，China
^3.State Key Laboratory of Polymer Science and Technology，Changchun Institute of Applied Chemistry Chinese Academy of Sciences，Changchun 130022，China

Received:2024-11-11 Accepted:2025-04-01 Published:2025-05-01 Online:2025-06-05
Contact: Ji-Fu BI
About author:bijifu@ciac.ac.cn
Supported by:
the Research Project of the State Key Laboratory of Polymer Physics and Chemistry(PPCL2023-19);173 Basic Strengthening Program(2023-JCJQ-JJ-1080);National Science and Technology Major Project(2024ZD0603200)

Abstract

Abstract:

Based on butadiene-isoprene rubbers of different Mooney viscosities， the relationships of different rheological parameters for raw rubbers， uncured compounds and crosslinking reaction in the synthetic rubber application were studied. The results show that： Mooney viscosity of raw rubber， MV_{raw rubber}， shows an exponential relationship with the area under the relaxation curve （A）（MV_{raw rubber}=72.39lg A-129.76） and the frequency （MV_{raw rubber}=-30.205lg f_c+24.97） corresponding to τ_rep （f_c） with the R²＞0.98. The Mooney viscosity of rubber composites， MV_compound， is dominated by MV_{raw rubber}， and the relative parameters of MV_{raw rubber}， MV_compound， ML and $G_{γ}^{'}$ _=100% display linear relationships； the R² of MV_compound with MLand $G_{γ}^{'}$ _=100% are 0.9474 and 0.954， respectively； and the R² for other parameters is between 0.9722 and 0.9908. The scorch behavior of rubber composites is influenced by molecular weight of raw rubber； the higher MV_{raw rubber} results in short scorch time and higher torque， but it hardly affects the crosslinking rate （MCR）， and the R² between MCR and all other rheological parameters is below 0.1.

Key words: Butadiene-isoprene copolymers, Nano composites, Rheological measurement, Viscoelastic parameters

CLC Number:

O631

Tian-Yi ZHOU, Xiao-Hu ZHANG, Guang-Li HU, San-Rong LIU, Ji-Fu BI. The Relationships Between Different Parameters of Visco-Elastic Testing for Nano-Composites of Butadiene-Isoprene Copolymers[J]. Chinese Journal of Applied Chemistry, 2025, 42(5): 684-692.

Figures/Tables 11

Table 1 Parameters of relaxation behaviors for different butadiene-isoprene rubbers

No.	MV_{raw rubber}/MU	k/MU	α	A/（MU?s）	MSR/（MU?s^-1）	MV_compound/MU	Q
1	37.79	12.57	-0.607 7	192.51	-0.984 6	66.31	2.84
2	46.05	16.30	-0.585 9	265.54	-0.940 8	74.82	2.78
3	72.19	29.40	-0.467 3	683.71	-0.752 9	98.25	2.78
4	47.35	16.63	-0.569 2	284.34	-0.942 3	74.33	2.82
5	32.86	11.32	-0.600 0	177.14	-0.938 2	59.39	2.89
6	53.89	19.76	-0.554 6	352.49	-0.894 4	82.97	2.76
7	25.47	6.54	-0.486 7	143.1	-0.947 1	48.88	2.88
8	22.67	5.75	-0.481 2	128.04	-0.941 6	45.80	2.97
9	44.37	15.10	-0.577 8	251.2	-0.926 1	70.80	2.87
10	45.75	16.17	-0.597 8	254.74	-0.946 5	72.55	2.77
11	42.66	14.93	-0.592 6	238.68	-0.926 5	72.50	2.78
12	22.86	5.80	-0.456 8	139.3	-0.900 5	46.05	3.01
13	37.95	12.31	-0.575 3	206.72	-0.943 4	64.42	2.88
14	61.87	23.58	-0.561 6	412.19	-0.889 8	92.08	2.77
15	64.87	24.32	-0.536 8	457.34	-0.854 1	93.71	2.75
16	54.82	18.54	-0.521 7	364.77	-0.897 0	82.98	2.79

Fig.1 Relationship between Mooney viscosity of raw rubber and relaxation behaviors

Fig.2 The relationship of MVraw rubber with MVcompound（A） and MVr（B）

Fig.3 The relationship of MLwith MVraw rubber and MVcompound

Fig.4 The relationship between Mooney viscosity and rheological parameters of compound

Fig.5 The relationship between ML and parameters during crosslinking reaction

Fig.6 The relationship between MCR and ML

Fig.7 The relationship of ML with MH （A） and （MH-ML）（B）

Table 2 The relativity of viscosity parameters for raw rubber and compounds

R²	MV_{raw rubber}/MU	A/（MU?s）	f_c/Hz	MV_compound/MU	$G_{γ}^{'}$ _=100%/MPa	ML/dNm
MV_{raw rubber}/MU	1	0.983 1	0.987 2	0.988 3	0.986 5	0.976 1
A/（MU?s）		1	0.951 5	0.937 2	0.984 4	0.972 2
f_c/Hz			1	0.984 5	0.954	0.947 4
MV_compound/MU				1	0.990 8	0.981 7
$G_{γ}^{'}$ _=100%/MPa					1	0.981 7
ML/dNm						1

Table 2 The relativity of viscosity parameters for raw rubber and compounds

R²	MV_{raw rubber}/MU	A/（MU?s）	f_c/Hz	MV_compound/MU	$G_{γ}^{'}$ _=100%/MPa	ML/dNm
MV_{raw rubber}/MU	1	0.983 1	0.987 2	0.988 3	0.986 5	0.976 1
A/（MU?s）		1	0.951 5	0.937 2	0.984 4	0.972 2
f_c/Hz			1	0.984 5	0.954	0.947 4
MV_compound/MU				1	0.990 8	0.981 7
$G_{γ}^{'}$ _=100%/MPa					1	0.981 7
ML/dNm						1

Table 3 The relativity of crosslinking parameters for compounds

R²	MV_{raw rubber}/MU	t₁₀/min	t₅₀/min	t_s-1/min	t_s-2/min	MCR/min^-1
MV_{raw rubber}/MU	1	0.748 2	0.520 6	0.867 8	0.691 1	0.014 4
t₁₀/min		1	0.867	0.940 7	0.965 1	0.028 3
t₅₀/min			1	0.738 7	0.935 3	0.016 5
t_s-1/min				1	0.899 8	0.024 9
t_s-2/min					1	0.001 5
MCR/min^-1						1

Table 4 The relativity of parameters for raw rubber and compounds with crosslinking degree

R²	MV_{raw rubber}/MU	ML/dNm	MH/dNm	（MH-ML）/dNm
MV_{raw rubber}/MU	1	0.976 1	0.639 7	0.857 7
ML/dNm		1	0.870 8	0.645 0
MH/dNm			1	0.928 6
（MH-ML）/dNm				1

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The Relationships Between Different Parameters of Visco-Elastic Testing for Nano-Composites of Butadiene-Isoprene Copolymers

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