1、合成橡胶工业第46卷Preparation and characterization of aerobic recycledwaste tire rubber powderZHANG Zhen1,2,ZHENG Xiao-guang1,FANG Jia-yi2,MA Lan2,LIU Shuang2,WANG Shi-feng2（1.Shanghai Municipal Engineering Design Institute(Group)Co Ltd,Shanghai 200092,China；2.Research Institute of Polymer Meterials,Shangha
2、i Jiao Tong University,Shanghai 200240,China）Abstract:The aerobic regeneration of waste tirerubber powder was carried out in a tubular furnace,and the effects of atmosphere,regeneration tempera-ture and regeneration time on the aerobic regenera-tion process of waste tire rubber powder were inves-tig
3、ated.The results showed that the mass loss andmass fraction of sol of rubber powder increased withthe increasing temperature under aerobic conditions.The secondary recombination and re-crosslinking re-action occurred in the molecular chains of syntheticrubber,while the main chain of natural rubber w
4、asmainly broken.When the rubber powder was treatedunder aerobic conditions for 10 min at 240,themass fraction of sol reached 55.9%.The fracture ofrubber main chain and cross-link bond was mainlybroken by oxidation reaction.The aerobic reclama-tion of waste rubber generated the compounds con-taining
5、carbonyl and sulfoxide groups,accompanyingthe formation of water and carbon dioxide.Thesephenomena indicated that the rubber molecularchain in rubber powder was effectively broken byoxidative reaction.Key words:waste tire rubber powder;aerobic re-generation;regeneration temperature;regenerationtime;
6、oxidation reaction国内简讯2023年我国苯乙烯市场预测据合成橡胶工业协会网站3月2日报道，展望2023年苯乙烯市场或呈前高后低的走势。2023年依然是苯乙烯产能迅速扩张的一年，上半年反倾销结束，国外产品或席卷而来对国内市场形成压制，同时下游产能释放不及时，多重因素作用下，预计2023年苯乙烯整体价格或低于2022年，利润也难有大的提升。2023年随着新装置投产，苯乙烯产能增速有望达到23%。如果排除因供需矛盾加剧导致投产推迟的情况，那么今年苯乙烯产量增速或为17%。受此影响，今年苯乙烯市场运行或呈前高后低态势，年内均价将低于2022年。此外，影响今年苯乙烯市场波动的另一因素是
7、反倾销将结束。在今年6月反倾销结束后，我国作为全球苯乙烯的最大消费国，将吸引全球苯乙烯生产厂家的目光。虽然国内苯乙烯新产能不断释放，进口依存度持续降低，但国际间的货源流动将持续，或在一定时段内给国内市场带来压力。2023年，纯苯下游行业较多，从消费占比来看，对纯苯消费量较大的产品依然是苯乙烯，占比约47%。同时，今年苯乙烯产能继续急速扩张，对纯苯需求依然增多。2023年，苯乙烯供应逐渐饱和，需求虽预期增加，但增速远不及苯乙烯的产量增速，出口将继续成为苯乙烯生产企业减少产销压力的重要渠道。进口方面，随着苯乙烯反倾销税取消，中韩关税将有较大幅度下降，预计下半年苯乙烯整体进口量会出现小幅增长。但由于人民币竞争能力提升，苯乙烯进口的幅度增量不会太大。118
