青岛科技大学 橡塑材料与工程教育部重点实验室 青岛 266042
青岛科技大学 化工学院 青岛 266042
lilu@qust.edu.cn
liuqiang@qust.edu.cn
收稿:2026-03-09,
录用:2026-04-10,
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张星龙, 朱昱, 刘祎梦, 徐子淋, 徐博瑜, 李会, 李露, 刘强, 闫寿科. 聚苯乙烯-b-聚异丁烯嵌段共聚物的合成及在丁基橡胶淤浆稳定剂的应用. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2026.26.132
Zhang, X. L.; Zhu, Y.; Liu, Y. M.; Xu, Z. L.; XU, B. Y.; Li, H.; Li, L.; Liu, Q.; Yan, S. K. Synthesis of polystyrene-b-polyisobutylene block copolymers and their application in butyl rubber slurry stabilizers. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2026.26.132
张星龙, 朱昱, 刘祎梦, 徐子淋, 徐博瑜, 李会, 李露, 刘强, 闫寿科. 聚苯乙烯-b-聚异丁烯嵌段共聚物的合成及在丁基橡胶淤浆稳定剂的应用. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2026.26.132 DOI:
Zhang, X. L.; Zhu, Y.; Liu, Y. M.; Xu, Z. L.; XU, B. Y.; Li, H.; Li, L.; Liu, Q.; Yan, S. K. Synthesis of polystyrene-b-polyisobutylene block copolymers and their application in butyl rubber slurry stabilizers. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2026.26.132 DOI:
以枯基氯(CumCl)/四氯化钛(TiCl
4
)/2
6-二叔丁基吡啶(DtBP)为引发体系,在−80 ℃的二氯甲烷(CH
2
Cl
2
)中实现了苯乙烯(St)与异丁烯(IB)的顺序嵌段阳离子聚合,合成了聚苯乙烯-
b
-聚异丁烯两嵌段共聚物(PS-PIB)。通过调控CumCl和TiCl
4
的浓度,实现了St的快速引发和定量转化。核磁共振氢谱(
1
H-NMR)证实,当CumCl和TiCl
4
的浓度分别为8.7和45 mmol/L,聚合时间为3 min,聚苯乙烯(PS)的活性氯末端基相比于枯基首端基的比例约为86%;随后,加入IB单体进行嵌段聚合反应,产物经过丙酮和正己烷提纯PS和PIB均聚物后,得到了相对分子质量(
M
n
)为2.14×10
4
g/mol、分子量分布(
M
w
/
M
n
)为1.95的嵌段共聚物。使用丁酮(MEK)和PIB680模拟丁基橡胶淤浆,向其
中加入1 wt%的PS-PIB嵌段共聚物,可以使浆液稳定分散;并且实验发现,嵌段产物不经丙酮和正己烷提纯,直接使用也同样可以实现稳定乳化。
Using a cumyl chloride (CumCl)/titanium tetrachloride (TiCl
4
)/2
6-di-tert-butylpyridine (DtBP) initiating system
the sequential cationic block polymerization of styrene (St) and isobutylene (IB) was successfully conducted in dichloromethane (CH
2
Cl
2
) at −80 ℃
affording polystyrene-
b
-polyisobutylene (PS-
b
-PIB). Rapid initiation and nearly quantitative conversion of styrene (St) were achieved by adjusting the concentrations of CumCl and TiCl
4
in the system. Proton nuclear magnetic resonance (
1
H-NMR) spectroscopy revealed that when the concentrations of CumCl and TiCl
4
were 8.7 and 45 mmol/L
respectively
and the polymerization time was 3 min
the proportion of active chlorine end groups relative to cumyl initiating end groups in the resulting polystyrene (PS) reached approximately 86%. Upon the subsequent addition of the IB monomer
block copolymerization proceeded successfully. After purification with acetone and n-hexane to remove residual PS and PIB homopolymers
a PS-
b
-PIB diblock copolymer with a number-average molecular weight (
M
n
) of 2.14×10
4
g/mol and a molecular weight dispersity (
M
w
/
M
n
) of 1.95 was obtained. A simulated butyl rubber slurry was prepared using methyl ethyl ketone (MEK) and PIB680
and the addition of 1 wt% PS-
b
-PIB afforded a stable dispersion. Notably
the experimental results further demonstrated that the crude block copolymer product could be directly used without acetone and n-hexane purification
while still achieving stable emulsification.
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