|Table of Contents|

Effects of different styrenic triblock copolymers on micromorphology and high temperature performance of modified asphalt(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2024年1期
Page:
13-23
Research Field:
道路工程
Publishing date:

Info

Title:
Effects of different styrenic triblock copolymers on micromorphology and high temperature performance of modified asphalt
Author(s):
AI Chang-fa1; 2;  YI Hong-yu1; 2; 3;  KOU Yin-song4;  NING Wen-hao1; 2; REN Dong-ya1; 2;  YAN Chuan-qi1; 2
(1. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China; 2. Highway Engineering Key Laboratory of Sichuan Province, Southwest Jiaotong University, Chengdu 610031,Sichuan, China; 3. China Railway Development and Investment Group Co. Ltd., Kunming 650200,Yunnan, China; 4. Institute of Transportation Development Strategy & Planning of Sichuan Province, Chengdu 610041, Sichuan, China)
Keywords:
road engineering;  styrenic triblock copolymer;  experimental;  particle size distribution;  compatibility;  rheological property
PACS:
U414
DOI:
10.19721/j.cnki.1671-8879.2024.01.002
Abstract:
In order to explore the effects of different types of styrenic-based triblock copolymers(STC)on the particle size distribution, compatibility, and high temperature performance of modified asphalt, and to analyze the correlation between particle size characteristic parameters and compatibility, first, fluorescence microscopy experiments were conducted to observe the microstructure of the modifier in the modified asphalt, and image pro plus was used to calculate the fluorescence particle characteristic parameters to determine the dispersion uniformity. Secondly, frequency sweep tests were conducted on the modified asphalt and Han curves were drawn. The slope of the low frequency region characterized the compatibility of STC with asphalt, and the correlation between the slope of the Han curve and the fluorescence particle characteristic parameters was analyzed. Finally, temperature sweep tests, frequency sweep tests, and MSCR tests were performed on the modified asphalt to investigate the effects of different types of STC on the high temperature rheological properties of modified asphalt. The results show that according to the characteristics of STC, it is more difficult for the modifiers with larger block ratio and crystallization degree to disperse evenly in the modified asphalt, but containing methyl side chains improves the dispersion uniformity of the modifiers in the asphalt. The dispersion uniformity of the modifiers with a star structure is weaker than that of the linear structure. The characteristic parameters of fluorescent particles in fluorescence micrograph have a good correlation with the slope of the Han curve, and the correlation between average particle size and particle size range is the best. The compatibility between the modifier and asphalt can be preliminarily judged based on the two characteristic parameters of fluorescent particles. Styrene butadiene styrene(SBS)modified asphalt with a block ratio of 3/7 has the best resistance to rutting, ZSV value, and elastic recovery performance, and the best high-temperature rheological properties. Star-shaped structure modified asphalt forms a stronger network structure and has better high-temperature rheological properties than the linear structure. The high crystallinity of styrene ethylene butylene styrene(SEBS)makes the composite modulus and zero shear viscosity(ZSV)of the modified asphalt larger, but its smaller entropy elasticity reduces the elastic recovery performance of the modified asphalt. Styrene isoprene styrene(SIS)has a high degree of side chain activation, which interacts with the asphalt to produce excellent elastic recovery performance of the modified asphalt. At the same time, due to the side chains, the crystallinity is lowered, resulting in a lower composite modulus.6 tabs, 5 figs, 36 refs.

References:

[1] 钱伯章.国内外热塑性弹性体市场与产品开发进展[J].化工新型材料,2011,39(增2):61-75,81.
QIAN Bo-zhang.The thermosplastic elastome markets and product progress at home and abroad[J].New Chemical Materials,2011,39(S2):61-75,81.
[2]LEE W F,CHEN C Y.Graft copolymerization of 3-(trimethoxysilyl)propyl methacrylate onto styrene-butadiene-styrene triblock copolymer[J].Journal of Elastomers & Plastics,2015,47(2):103-116.
[3]WYPYCH G.Handbook of polymers[M].Toronto:Chem Tec Publishing,2013.
[4]胡 勇.SBS聚合物和沥青相容性的耗散动力学研究[D].东营:中国石油大学(华东),2018.
HU Yong.Study on the compatibility between SBS co-polymers and asphalt by dissipative particle dynamics[D].Dongying:China University of Petroleum(Huadong),2018.
[5]刘祖广,王仕峰,王迪珍.不同S/B比例的SBS改性沥青的分散形态及性能[J].塑料工业,2005,33(4):50-53.
LIU Zu-guang,WANG Shi-feng,WANG Di-zhen.Morphology and properties of SBS modified asphalt of different S/B ratio[J].China Plastics Industry,2005,33(4):50-53.
[6]HAN S,XUE X E,YU C H,et al.Diffusion and reinforcement mechanism study of the effect of styrene/butadiene ratio on the high-temperature property of asphalt using molecular dynamics simulation[J].Molecular Simulation,2022,48(4):290-302.
[7]韩 凌.SBS与沥青相容性及改性工艺优化研究[D].东营:中国石油大学(华东),2017.
HAN Ling.Study on compatibility of SBS and asphalt and optimization of modification process[D].Dong-ying:China University of Petroleum(Huadong),2017.
[8]宋 亮,王朝辉,舒 诚,等.SBS/胶粉复合改性沥青研究进展与性能评价[J].中国公路学报,2021,34(10):17-33.
SONG Liang,WANG Chao-hui,SHU Cheng,et al.Research progress and performance evaluation of SBS/CR-modified asphalt[J].China Journal of Highway and Transport,2021,34(10):17-33.
[9]HERNANDEZ G,MEDINA E M,SANCHEZ R,et al.Thermomechanical and rheological asphalt modification using styrene-butadiene triblock copolymers with different microstructure[J].Energy & Fuels,2006,20(6):2623-2626.
[10]DONG F Q,ZHAO W Z,ZHANG Y Z,et al.Influence of SBS and asphalt on SBS dispersion and the performance of modified asphalt[J].Construction and Building Materials,2014,62:1-7.
[11]LI G N,GU Z J,TAN Y Q,et al.Research on the phase structure of styrene-butadiene-styrene modified asphalt based on molecular dynamics[J].Construction and Building Materials,2022,326:126933.
[12]LIANG M,XIN X,FAN W Y,et al.Phase field simulation and microscopic observation of phase separation and thermal stability of polymer modified asphalt[J].Construction and Building Materials,2019,204:132-143.
[13]梁 明.聚合物改性沥青多相体系的流变学和形态学研究[D].东营:中国石油大学(华东),2017.
LIANG Ming.Rheology and morphology for the heterogeneous system of polymer modified asphalt[D].Dongying:China University of Petroleum(Huadong),2017.
[14]陈竟涛.不同嵌段比SBS高粘改性沥青性能研究[D].重庆:重庆交通大学,2021.
CHEN Jing-tao.Study on properties of high viscosity modified asphalt with different block ratio SBS[D].Chongqing:Chongqing Jiaotong University,2021.
[15]SONG J L,YE C Y,WANG B L,et al.The current using situation of SBS modified asphalt in China and a new method of monitoring SBS modifier dosage[J].Advanced Materials Research,2013(706/707/708):575-578.
[16]黄卫东,孙立军,游 宏.SBS改性沥青流变性质与显微结构的关系[J].同济大学学报(自然科学版),2003,31(8):916-920.
HUANG Wei-dong,SUN Li-jun,YOU Hong.Relationship between rheological properties and microstructure of SBS modified asphalt[J].Journal of Tongji University(Nature Science),2003,31(8):916-920.
[17]SCHAUR A,UNTERBERGER S,LACKNER R.Impact of molecular structure of SBS on thermomechanical properties of polymer modified bitumen[J].European Polymer Journal,2017,96:256-265.
[18]ZHANG F,HU C B,ZHANG Y.Research for SEBS/PPA compound-modified asphalt[J].Journal of Applied Polymer Science,2018,135:46085.
[19]ZHANG F,HU C B,ZHANG Y.The research for SIS compound modified asphalt[J].Materials Chemistry and Physics,2018,205:44-54.
[20]徐 琦.SEBS与SBS改性沥青性能对比研究[J].合成材料老化与应用,2019,48(4):39-43.
XU Qi.Comparative study on performance of SEBS and SBS modified asphalt[J].Synthetic Materials Aging and Application,2019,48(4):39-43.
[21]张 瑜.多聚磷酸、硫磺对聚合物改性沥青性能的影响研究[D].福州:福州大学,2017.
ZHANG Yu.Study on the effect of PPA and sulfur on the performance of polymer modified asphalt[D].Fuzhou:Fuzhou University,2017.
[22]SOENEN H,LU X H,REDELIUS P.The morphology of bitumen-SBS blends by UV microscopy.An evaluation of preparation methods[J].Road Materials and Pavement Design,2008,9(1):97-110.
[23]王朝辉,邵 捷,宋 亮,等.SBS/胶粉复合改性新疆沥青制备及性能评价[J].长安大学学报(自然科学版),2023,43(2):1-15.
WANG Chao-hui,SHAO Jie,SONG Liang,et al.Preparation and performance evaluation of SBS/CR modified Xinjiang asphalt[J].Journal of Chang'an University(Natural Science Edition),2023,43(2):1-15.
[24]ZHANG Q Q,WANG T Z,FAN W Y,et al.Evaluation of the properties of bitumen modified by SBS copolymers with different styrene-butadiene structure[J].Journal of Applied Polymer Science,2014,131(12):40398.
[25]AREVALILLO A,MUNOZ M E,CALAFELL I,et al.Thermo-mechanical properties linked to rheological features in high molecular weight SEBS copolymers:Effect of styrene content and ethylene/butylene proportion[J].Polymer Testing,2012,31(7):849-854.
[26]ZHAO Z F,WANG Z Y,ZHANG C Q.Preparation and characterization of polarity-modulated SIS-based hot-melt pressure-sensitive adhesives[J].Journal of Adhesion Science and Technology,2014,28(11):1090-1102.
[27]何立平,魏建国,刘乐平,等.基于Han曲线的橡胶沥青结合料相态结构研究[J].公路交通科技,2017,34(5):10-18,94.
HE Li-ping,WEI Jian-guo,LIU Le-ping,et al.Study on phase structure of rubber asphalt binder based on Han curve[J].Journal of Highway and Transportation Research and Development,2017,34(5):10-18,94.
[28]HO R M,ADEDEJI A,GILES D W,et al.Microstructure of triblock copolymers in asphalt oligomers[J].Journal of Polymer Science Part B:Polymer Physics,1997,35(17):2857-2877.
[29]POLACCO G,MUSCENTE A,BIONDI D,et al.Effect of composition on the properties of SEBS modified asphalts[J].European Polymer Journal,2006,42(5):1113-1121.
[30]黄卫东,高 杰,郝庚任,等.高黏SBS改性沥青的流变性能与化学特性[J].建筑材料学报,2021,24(5):1024-1031,1038.
HUANG Wei-dong,GAO Jie,HAO Geng-ren,et al.Rheological properties and chemical properties of high viscosity SBS modified asphalt[J].Journal of Building Materials,2021,24(5):1024-1031,1038.
[31]王万杰.苯乙烯类嵌段共聚物及其共混物的黏弹行为研究[D].杭州:浙江大学,2006.
WANG Wan-jie.Studies on the viscoelastic behaviors of styrene block copolymers and their blends[D].Hangzhou:Zhejiang University,2006.
[32]郁秋明.分子结构对苯乙烯-丁二烯共聚物相行为的影响[D].杭州:浙江大学,2006.
YU Qiu-ming.Influence of molecular structure on the phase behavior of styrene-butadiene copolymer[D].Hangzhou:Zhejiang University,2006.
[33]GHOSH S,BHOWMICK A K,ROYCHOWDHURY N,et al.Influence of block molecular weight on the properties of styrene-ethylenebutylene-styrene block copolymers[J].Journal of Applied Polymer Science,2000,77(7):1621-1628.
[34]XIA C M,LUO Y W.Modification of bitumen emulsion via heterocoagulation with SIS triblock copolymer latex[J].Journal of Applied Polymer Science,2017,134(48):45510.
[35]ZHANG H L,CHEN Z H,XU G Q,et al.Evaluation of aging behaviors of asphalt binders through different rheological indices[J].Fuel,2018,221:78-88.
[36]DANGELO J,KLUTTZ R,DONGRE R N,et al.Revision of the Superpave high temperature binder specification:The multiple stress creep recovery test[J].Asphalt Paving Technology,2007,76:123-162.

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Last Update: 2024-01-10