作者机构：
[方学智; 杜孟浩; 罗凡; 姚小华] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang 311400, China;[孙汉洲] College of Science, Central South University of Forestry and Technology, Changsha, Hunan 410004, China;[田潇潇] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang 311400, China, College of Science, Central South University of Forestry and Technology, Changsha, Hunan 410004, China
通讯机构：
[Fang, X.-Z.] R;Research Institute of Subtropical Forestry, China
作者机构：
[孙汉洲] College of Science, Central South University of Forestry and Technology, Changsha, Hunan 410004, China;[杜孟浩] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang 311400, China;College of Life Science, Zhejiang University, Hangzhou, Zhejiang 311400, China;[方学智] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang 311400, China, College of Life Science, Zhejiang University, Hangzhou, Zhejiang 311400, China;[田潇潇] College of Science, Central South University of Forestry and Technology, Changsha, Hunan 410004, China, Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, Zhejiang 311400, China
通讯机构：
[Fang, X.-Z.] R;Research Institute of Subtropical Forestry, China
摘要：
A new route for the synthesis of 2(5H)-furanones is presented via Pd(PPh<sub>3</sub>)<sub>4</sub>-catalyzed cascade reaction of acetlenic acids with iodonium ylides using K<sub>2</sub>CO<sub>3</sub> as the base. The cascade proceeds through dehydrogenation coupling and cyclization under mild conditions.
作者：
Zhou, J. H.*;Du, X. J.;Sun, H. Z.;Gao, H. L.;Tan, X. F.;...
作者机构：
[Zhou, J. H.] Cent South Univ Forestry & Technol, Inst Appl Chem, Changsha, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Key Lab Nonwood Forest Prod State Forestry Adm, Changsha, Hunan, Peoples R China.
会议名称：
2nd International Conference on Material Engineering and Application (ICMEA)
会议时间：
OCT 17-18, 2015
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Zhou, J. H.] Cent South Univ Forestry & Technol, Inst Appl Chem, Changsha, Hunan, Peoples R China.^Cent South Univ Forestry & Technol, Key Lab Nonwood Forest Prod State Forestry Adm, Changsha, Hunan, Peoples R China.
摘要：
PU has many good and practical properties but its heat resistance is not so satisfying that PU is not suitable to be used in some high temperature and high humid occasions. To improve PU's heat resistance, Tung oil-based bi-dihydrogen-maleimide, TOBBDHMI, which starts from a Chinese renewable resource Tung oil, has been introduced into PU to form PU/TOBBDHMI interpenetrating polymer network through in-situ polymerization. Mechanical properties, thermal performances and morphology were compared between ordinary PU and PU/TOBBDHMI IPN. Experimental results show that along with the weight content of TOBBDHMI in the IPNs increases, hardness and tensile strength of PU/TOBBDHMI IPNs increases while the elongation at break decreases. The heat resistance of PU has improved a lot since the IPN forms: the initial decomposition temperature has improved from 275 degrees C (PU) to 320 degrees C (IPN). Thermal and morphology analysis indicated that the IPN has better compatibility than ordinary PU. Fracture SEM photograph shows that the IPN proceeds craze fracture mechanism in the tensile fracture.
作者：
Xia, Y.*;Sun, H. Z.;Li, N.;Ma, W. J.;Yang, J.;...
作者机构：
[Xia, Y.] Cent South Univ Forestry & Technol, Inst Appl Chem, Changsha, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Key Lab Nonwood Forest Prod State Forestry Adm, Changsha, Hunan, Peoples R China.
会议名称：
2nd International Conference on Material Engineering and Application (ICMEA)
会议时间：
OCT 17-18, 2015
会议地点：
Wuhan, PEOPLES R CHINA
会议主办单位：
[Xia, Y.] Cent South Univ Forestry & Technol, Inst Appl Chem, Changsha, Hunan, Peoples R China.^Cent South Univ Forestry & Technol, Key Lab Nonwood Forest Prod State Forestry Adm, Changsha, Hunan, Peoples R China.
摘要：
Waterborne polyurethane (WPU) emulsions were prepared with Tung oil monoglyceride (TOM) as modifier via the acetone process. The water absorption, emulsion particle size, thermal and mechanical property of the Modified WPU were investigated. The experimental results show that the modified WPU emulsion particle size increases along with the growth of weight content of TOM. Compared with the unmodified WPU emulsion film, water absorption of the modified WPU emulsion film has decreased significantly, indicating that water resistance is remarkably improved after the modification. Tensile test shows that the tensile strength of the modified WPU emulsion film increases with the content of TOM while the reverse is true for the elongation at break. The characteristic thermo-decomposition temperatures of WPU have been increased notably after modification by the introduction of TOM which indicates that the heat resistance has been improved after modification.
作者机构：
[周智华; 吴科建; 余斌; 李宁; 周虎] Key Laboratory of Theoretical Organic Chemistry and Function Molecule, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan;411201, China;[孙汉洲] College of Science, Central South University of Forestry and Technology, Changsha;410004, China;[周智华; 吴科建; 余斌; 李宁; 周虎] 411201, China
通讯机构：
Key Laboratory of Theoretical Organic Chemistry and Function Molecule, School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan, China
摘要：
<jats:p>Epoxidized methyl-<jats:italic>α</jats:italic>-eleostearate (EME) is a new kind of plant oil-based epoxidized aliphatic acid ester which starts from Tung oil. Tung oil is a special, but abundant biomass resource in China. A solvent-free synthetic technique for EME catalyzed by cation exchange resin was developed. Experimental results showed that the optimal synthetic conditions for EME were as follows: cation exchange resin dosage 5% (wt, calculated by methyl-<jats:italic>α</jats:italic>-eleostearate), material molar ratio of methyl-<jats:italic>α</jats:italic>-eleostearate, H<jats:sub>2</jats:sub>O<jats:sub>2</jats:sub> and CH<jats:sub>3</jats:sub>COOH 1:5:2.5, reaction duration 3 h and reaction temperature 65 °C. EME epoxy value reaches 6.5% under the optimal preparation conditions. The newly developed green technique features low cost, simple operation, low energy consumption, less pollution, short production cycle and good quality and is promising to be industrialized.</jats:p>
摘要：
Tung oil is a special biomass resource in China. Tung Oil has the characteristic to be transformed into serial derivatives for its active Conjugated double bond. Especially, tung oil anhydride-ester polyol (TOAEP) can be used as substitute of polyester polyol and/or polyether polyol in the synthesis and modification of polyurethane materials. Through esterification and transesterification, methyl-α-eleostearate-maleic anhydride adduct (MEMAA), a derivative of tung oil, was reacted with ethylene glycol and tung oil anhydride-ester polyol (TOAEP) was obtained. The optimal preparation condition are as follows: p-toluene sufonic acid is used as the catalyst, mole ratio of ethylene glycol to MEMAA is 4:1, reaction temperature is 120°C ~130°C, reaction duration is 8 h. Under the optimal preparation conditions, the yield of TOAEP is up to 88.8% and the hydroxyl value is up to 318.0 mg KOH/g. The structure of TOAEP was confirmed by Infrared spectroscopy (IR).
