Yongjia Jiang , Xiaocheng Han , Jie Gong , Zhonghua Xi , Jun Cai , Qingjun Wang , Guowei Ding , Hongfeng Xie
{"title":"溴化SBS改性环氧沥青粘结剂的室内研究","authors":"Yongjia Jiang , Xiaocheng Han , Jie Gong , Zhonghua Xi , Jun Cai , Qingjun Wang , Guowei Ding , Hongfeng Xie","doi":"10.1016/j.conbuildmat.2019.116733","DOIUrl":null,"url":null,"abstract":"<div><p>Brominated styrene–butadienestyrene triblock copolymer (BrSBS) is a novel polymeric flame retardant (PolyFR), which is eco-friendly due to its huge molecule weight. In this paper, BrSBS was added into an epoxy asphalt binder (EAB) to enhance the flame resistance of EAB. The microstructure, viscosity, fire resistance, thermal stability, dynamic mechanical behaviors and mechanical properties of BrSBS modified EABs (EBrSAs) were studied. Double phase separation occurred in EBrSAs. BrSBS modified asphalt (BrSA)-rich phase co-continuously dispersed in the continuous epoxy matrix when BrSBS content was lower. However, phase-inverted morphology appeared when the BrSBS content was higher. In other words, the epoxy-rich phase dispersed in the continuous BrSA-rich phase. The amine curing agent reacted with BrSBS through a bimolecular nucleophilic substitution (S<sub>N</sub>2) mechanism, resulting in the formation of epoxy/BrSBS interpenetrating polymer networks (IPNs). The incorporation of BrSBS greatly increased the viscosity of the neat EAB due to the nucleophilic substitution reaction between BrSBS and amine curing agent. BrSBS with lower loading significantly improved the flame retardancy of the neat EAB. BrSBS lowered the thermal stability, mechanical and damping behaviors of the neat EAB. However, the glass transition temperature (<em>T</em><sub>g</sub>) of the neat EAB was notably enhanced with the inclusion of BrSBS.</p></div>","PeriodicalId":288,"journal":{"name":"Construction and Building Materials","volume":null,"pages":null},"PeriodicalIF":7.4000,"publicationDate":"2019-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.conbuildmat.2019.116733","citationCount":"29","resultStr":"{\"title\":\"Laboratory investigation of epoxy asphalt binder modified by brominated SBS\",\"authors\":\"Yongjia Jiang , Xiaocheng Han , Jie Gong , Zhonghua Xi , Jun Cai , Qingjun Wang , Guowei Ding , Hongfeng Xie\",\"doi\":\"10.1016/j.conbuildmat.2019.116733\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Brominated styrene–butadienestyrene triblock copolymer (BrSBS) is a novel polymeric flame retardant (PolyFR), which is eco-friendly due to its huge molecule weight. In this paper, BrSBS was added into an epoxy asphalt binder (EAB) to enhance the flame resistance of EAB. The microstructure, viscosity, fire resistance, thermal stability, dynamic mechanical behaviors and mechanical properties of BrSBS modified EABs (EBrSAs) were studied. Double phase separation occurred in EBrSAs. BrSBS modified asphalt (BrSA)-rich phase co-continuously dispersed in the continuous epoxy matrix when BrSBS content was lower. However, phase-inverted morphology appeared when the BrSBS content was higher. In other words, the epoxy-rich phase dispersed in the continuous BrSA-rich phase. The amine curing agent reacted with BrSBS through a bimolecular nucleophilic substitution (S<sub>N</sub>2) mechanism, resulting in the formation of epoxy/BrSBS interpenetrating polymer networks (IPNs). The incorporation of BrSBS greatly increased the viscosity of the neat EAB due to the nucleophilic substitution reaction between BrSBS and amine curing agent. BrSBS with lower loading significantly improved the flame retardancy of the neat EAB. BrSBS lowered the thermal stability, mechanical and damping behaviors of the neat EAB. However, the glass transition temperature (<em>T</em><sub>g</sub>) of the neat EAB was notably enhanced with the inclusion of BrSBS.</p></div>\",\"PeriodicalId\":288,\"journal\":{\"name\":\"Construction and Building Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":7.4000,\"publicationDate\":\"2019-12-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/j.conbuildmat.2019.116733\",\"citationCount\":\"29\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Construction and Building Materials\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0950061819321518\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CONSTRUCTION & BUILDING TECHNOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Construction and Building Materials","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0950061819321518","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CONSTRUCTION & BUILDING TECHNOLOGY","Score":null,"Total":0}
Laboratory investigation of epoxy asphalt binder modified by brominated SBS
Brominated styrene–butadienestyrene triblock copolymer (BrSBS) is a novel polymeric flame retardant (PolyFR), which is eco-friendly due to its huge molecule weight. In this paper, BrSBS was added into an epoxy asphalt binder (EAB) to enhance the flame resistance of EAB. The microstructure, viscosity, fire resistance, thermal stability, dynamic mechanical behaviors and mechanical properties of BrSBS modified EABs (EBrSAs) were studied. Double phase separation occurred in EBrSAs. BrSBS modified asphalt (BrSA)-rich phase co-continuously dispersed in the continuous epoxy matrix when BrSBS content was lower. However, phase-inverted morphology appeared when the BrSBS content was higher. In other words, the epoxy-rich phase dispersed in the continuous BrSA-rich phase. The amine curing agent reacted with BrSBS through a bimolecular nucleophilic substitution (SN2) mechanism, resulting in the formation of epoxy/BrSBS interpenetrating polymer networks (IPNs). The incorporation of BrSBS greatly increased the viscosity of the neat EAB due to the nucleophilic substitution reaction between BrSBS and amine curing agent. BrSBS with lower loading significantly improved the flame retardancy of the neat EAB. BrSBS lowered the thermal stability, mechanical and damping behaviors of the neat EAB. However, the glass transition temperature (Tg) of the neat EAB was notably enhanced with the inclusion of BrSBS.
期刊介绍:
Construction and Building Materials offers an international platform for sharing innovative and original research and development in the realm of construction and building materials, along with their practical applications in new projects and repair practices. The journal publishes a diverse array of pioneering research and application papers, detailing laboratory investigations and, to a limited extent, numerical analyses or reports on full-scale projects. Multi-part papers are discouraged.
Additionally, Construction and Building Materials features comprehensive case studies and insightful review articles that contribute to new insights in the field. Our focus is on papers related to construction materials, excluding those on structural engineering, geotechnics, and unbound highway layers. Covered materials and technologies encompass cement, concrete reinforcement, bricks and mortars, additives, corrosion technology, ceramics, timber, steel, polymers, glass fibers, recycled materials, bamboo, rammed earth, non-conventional building materials, bituminous materials, and applications in railway materials.