酸化硫化对SBS改性沥青的影响机理

IF 1.1 4区工程技术 Q4 ENGINEERING, CHEMICAL

International Polymer Processing Pub Date : 2022-09-16 DOI:10.1515/ipp-2022-4233

Feng Zhang, Lei Li

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引用次数: 3

摘要

摘要通过添加多磷酸(PPA)和硫，制备了一种苯乙烯-丁二烯-苯乙烯(SBS)改性沥青复合材料。考察了PPA和硫对其韧性、韧性、耐老化性和贮存稳定性等主要物理性能的影响。采用扫描电镜(SEM)、凝胶过滤色谱(GPC)和热分析等方法研究了SBS改性(SM)沥青、SBS/PPA改性(SPM)沥青和SBS/PPA/硫改性(SPSM)沥青的结构特征。酸化使SBS颗粒聚集，抑制了SBS的膨胀，使SPM沥青更容易老化。硫化改变了SBS在沥青中的形态特征，改善了SBS与沥青的相容性，减弱了SBS的老化敏感性。因此，采用PPA和硫共同改性SM沥青是合理的。

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Effect mechanism of acidification and vulcanization on SBS-modified asphalt

Abstract A styrene-butadiene-styrene (SBS) modified asphalt compound was prepared by the addition of polyphosphoric acid (PPA) and sulfur. The effect of PPA and sulfur on major physical properties, including toughness and tenacity, aging resistance, and storage stability was investigated. The structural characteristics of SBS-modified (SM) asphalt, SBS/PPA-modified (SPM) asphalt, and SBS/PPA/sulfur-modified (SPSM) asphalt were investigated using scanning electron microscopy (SEM), gel filtration chromatography (GPC), and thermal analysis. It has been found that acidification prompted the clustering of SBS particles and confined the swelling of SBS, making SPM asphalt more susceptible to aging. Vulcanization changed the morphological characteristics of SBS in asphalt, improved the compatibility between SBS and asphalt, and weakened the aging susceptibility. Therefore, it is reasonable to modify SM asphalt by using PPA and sulfur together.

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来源期刊

International Polymer Processing 工程技术-高分子科学

CiteScore

2.20

自引率

7.70%

发文量

审稿时长

6 months

期刊介绍： International Polymer Processing offers original research contributions, invited review papers and recent technological developments in processing thermoplastics, thermosets, elastomers and fibers as well as polymer reaction engineering. For more than 25 years International Polymer Processing, the journal of the Polymer Processing Society, provides strictly peer-reviewed, high-quality articles and rapid communications from the leading experts around the world.