摘要：
The rheological behavior, characterization of the aging behavior, kinetics of vulcanization and mechanical properties of natural rubber coagulated by microorganisms (NR-m) was studied. The thermal and thermooxidative degradation kinetics of NR-m in nitrogen and air was investigated by thermogravimetry analysis (TG) and differential thermal analysis (DTA). The results showed that the effect of temperature on viscosity of raw NR followed the Arrhenious-Frenkel-Eyring model. The storage torque, complex viscosity of NR-m were higher than those of natural rubber coagulated by acid (NR-a) while the loss factor was lower. The viscous flow behavior of NR-m was poorer than those of NR-a. With the prolongation of the aging time, the storage modulus, storage torque, and complex viscosity of raw NR-m decreased while the loss modulus were increased. In the induction period of vulcanization, the time t0 of NR-m is shorter than that of natural rubber coagulated by acid (NR-a). Both the curing periods of NR-m and NR-a consist of two stages. The first stage follows first-order reaction, while the second stage (end stage of the curing period) does not follow first-order reaction. The modulus, tensile strength, tearing strength and hardness (shore A) of NR-m is markedly higher than those of NR-a. The results of thermal analysis indicate that the thermal degradation of NR-m in nitrogen is significantly different from the thermooxidative degradation of NR-m in air. There is only one-stage in the thermal degradation reaction of NR-m, while thermooxidative degradation of NR-m in air is a two-stage reaction. The initial temperature of weight loss (T0) and the peak temperature of weight loss（Tp）as well as the reaction activation energy (Ea) of NR-m are higher than those of nature rubber coagulated by acid (NR-a).
关键词：natural rubber, microorganism coagulation, rheological properties; kinetics of vulcanization; mechanical properties; thermal degradation
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个人简介：
廖双泉，男，汉族，中共党员，1974年7月生，福建连城人。海南大学材料与化工学院副院长，教授，博士生导师。北京理工大学博士，英国爱丁堡大学博士后。
国际橡胶会议组委会成员、技术委员会委员；中国化工学会橡胶专业委员会会员；中国天然橡胶协会理事；中国纤维素行业协会技术委员会副主任委员；海南热带作物学会理事；海南低碳经济与产业技术研究院理事。
海南省首批“515人才工程”人选，海南省首批优秀中青年骨干教师，海南省精品课程负责人，海南大学首届最受欢迎研究生导师。
主要从事天然橡胶改性及应用、海南优势资源的研究与开发以及海南应对气候变化和低碳发展研究。近年来主持国家支撑计划项目1项，国家自然科学基金2项，973前期研究专项1项，省部级项目5项；出版教材专著5部，国家专利8项，国内外发表论文100多篇。获海南省优秀硕士论文指导教师、海南省高等学校优秀科研成果二等奖、吴多泰博士科研成果三等奖。
廖双泉 教授