Poly (butylene succinate) (PBS) was mixed with Poly (lactic acid) (PLA) in the melt state. The PLA/PBS blends with different constitution were produced. The samples were buried in laterite. Samples were dug out of soil after the burial for 10, 20, 30, 40, 50 and 60 days, respectively. The weight loss and molecular weight of the sample were tested. The analysis showed that the nearly exponential decrease in average molecular weight as a function of degradation time. The PLA and PBS have the similar degradation behavior in the soil.

The Avrami equation was used in the study of the isothermal crystallization kinetics of Polyvinyl pyrrolidone/Polyamide 6 Blends. The addition of PVP can hinder the PA6 crystallization process, increase the crystallization half-time and make the crystallization rate decrease. The molecular entanglements and intermolecular hydrogen bonds between PA6 and PVP chains exert some influence also.

3-10％(wt) Polyvinyl pyrrolidone (PVP) was mixed with PA6 through the twin-screw extruder, a new type of high hygroscopic nylon resins can be obtained. With the increasing addition of PVP the crystalline state of PA6 changes from γ to α phase. The intermolecular hydrogen bond exists between PVP and PA6. The FTIR and WAXD analysis can approve the existence of the intermolecular hydrogen bond and the change of the PA6 crystalline state.

This paper deals with the distributed model predictive control problem in multi-agent systems under fixed interaction topologies. we propose a distributed model predictive control schemes with guaranteed closed-loop stability. In this distributed structure, the problem is decomposed into a set of distributed optimal control problems. Simulation results show that the proposed scheme is effective under fixed interaction topologies among subsystems.

The anticorrosion performance of Al2024 deposited ZSM-5 zeolite membranes prepared by situ hydrothermal method is analyzed. The results of polarization curve show that the corrosion position of Al2024 deposited zeolite membranes was higher than blank samples and the samples position at 10 h was highest. The impandance rings of samples at 10 h was biggest and the corrosion charact was uniform corrosion different from pit corrosion of Al2024 without zeolite membranes.