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Abstract. A novel bisphenol 1, 4'-bis{4-[(4-hydroxy) phenyliminomethylidene] phenoxy} benzene (BHPB), which contains azomethine moiety and flexible aromatic ether linkage, was synthesized and introduced into the curing system composed of diglycidyl ether of bisphenol A (DGEBA) and diamine. The curing behavior of DGEBA/diamine changed dramatically due to the introduction of BHPB. The resultant epoxy thermosets containing BHPB had high Tgs (127-160°C), high Td,5% (≥ 330°C) and high integral procedure decomposition temperature (IPDT) values (662-1230°C) and good flame retardancy because of their high Limiting Oxygen Index (LOI) values (above 29.5).

Abstract.A novel reversible thermo-swelling gel was prepared from poly(vinyl alcohol)-trimellitate (PVA-T) by crosslinking with ethylene glycol diglycidyl ether (EGDGE). Only in the presence of sulfate anion, this polymer gel showed a significant and reversible swelling behavior with increasing the temperature from 5 to 40°C, and vice versa, probably due to the scission and formation of the inter-and/or intramolecular hydrogen-bondings (HBs) between the carboxyls on the side groups. The involvement of inter-and/or intramolecular HBs for the thermo-swelling behavior was also suggested by a significant dependence on HCl concentration of the swelling degree. In addition, the swelling reversibility and reproducibility were confirmed via the temperature jump between 5 and 40°C, well satisfying for a candidate as a thermosensitive material.

As an important part of s mart grid, microgrid(M G) is a new form of s mart grid in the future. Microgrid(MG) technology can effectively integrate the advantages of new energy and renewable energy generation and provide a novel way for large-scale applicat ions of new energy and renewable energy connecting to grid. This paper deals with the problem o f economic operation of microsources in the microgrid, such as micro -turbine(MT), fuel cell(FC), diesel generator(DG), photovoltaic cell(PV), wind turbine(WT), and battery storage. The proposed problem is formulated as a nonlinear constrained optimization problem. The paper takes into consideration the operation cost as well as the emission reduction of NO x , SO 2 , and CO 2 . So a mathematical optimal model is built to optimize operation of microgrid(M G) system, based on the characteristics of various microsources, the restraint of microgrid system and the predicting output of the next 24hours' wind turbine and photovoltaic cell and load demand. An improved particle swarm algorith m is emp loyed to minimu m the co mprehensive benefit cost of microgrid operation including economic and environmental benefits which realizes the mu lti-objective optimization operation. Besides, this paper focuses on the effect of electricity price between microgrid and the main grid on system operation costs. The results demonstrate the efficiency of the proposed approach to satisfy the load and to reduce the operation cost and the emissions. KEY WORDSparticle swarm algorith m, mu lt i-objective optimization operation, economic operation Microgrid, microsources, mathematical model, imp roved