偶联官能化SBS改性沥青的制备及其热储存稳定性评价
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摘要
选用一种新型的偶联官能化SBS,成功制备热储存稳定性良好的改性沥青,考察了SB段相对分子质量和偶联率对改性沥青性能的影响。结果表明:官能化SBS上的极性基团易与基质沥青中的极性基团相互作用,形成更有效的网状结构,从而使官能化SBS与基质沥青具有良好的相容性,改善了沥青的热储存稳定性和热性能;当SB段相对分子质量控制在6.5×10~4左右、偶联率在75%以上时,改性沥青性能最佳。
A new type of coupling functionalized SBS was used to prepare modified asphalt with thermal storage stability.The effect of the molecular weight of SB segment and the coupling efficiency on the properties of modified asphalt was investigated.The results showed that the polar groups of the functionalized SBS were easy to interact with the polar groups of the base asphalt to form a network structure,leading a good solubility between the functionalized SBS and matrix asphalt;the thermal storage stability and thermal performance of the modified asphalt were improved.The performance of modified asphalt was the best when the coupling efficiency was above 75% and the molecular weight of SB segment was 6.5×10~4.
A new type of coupling functionalized SBS was used to prepare modified asphalt with thermal storage stability.The effect of the molecular weight of SB segment and the coupling efficiency on the properties of modified asphalt was investigated.The results showed that the polar groups of the functionalized SBS were easy to interact with the polar groups of the base asphalt to form a network structure,leading a good solubility between the functionalized SBS and matrix asphalt;the thermal storage stability and thermal performance of the modified asphalt were improved.The performance of modified asphalt was the best when the coupling efficiency was above 75% and the molecular weight of SB segment was 6.5×10~4.
引文
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[2] 段中夏.反应性SBS改性沥青的制备及性能研究[D].武汉:武汉理工大学,2006
[3] 王强.端基官能化SBS的合成及其在改性沥青中的应用[D].大连:大连理工大学,2005
[4] 于进军,王燕飞.SBS改性道路沥青的性能概述[J].石化技术,2000,7(2):121-125
[5] 吉勇海,郭淑华,李锐.SBS改性沥青的相容性和稳定性机理[J].石油学报(石油加工),2002,18(3):23-29
[6] 郭淑华.聚合物改性沥青的相容性及稳定性[J].石油沥青,2000,14(2):6-13
[7] 陈颖娣,范春华,涂娟,等.化学助剂对SBS改性沥青的性能影响初探[J].石油沥青,2012,26(1):24-28
[8] 郑仰才.官能化的合成及其应用[D].大连:大连理工大学,2007
[9] 廖明义,郑仰才,金美花.以西弗碱为封端剂原位合成官能化苯乙烯-丁二烯-苯乙烯嵌段共聚物[J].合成橡胶工业,2008,31(2):109-112
[10] 李静静,倪春霞,陈仕兵,等.端环氧基苯乙烯-丁二烯-苯乙烯嵌段共聚物的制备及在改性沥青中的应用[J].合成橡胶工业,2017,40(6):415-420
[11] 赵仕林,万芳,陈赞,等.反应助剂对SBS改性沥青的化学改性研究[J].公路交通科技,2007,24(7):20-23
[12] 郭艳,蒋遥明,李超,等.用DSC研究改性沥青体系的热储存稳定性[J].高分子材料科学与工程,2003,19(4):144-147