3、聚合物反应加工与高性能高分子材料。研究加工流场中体系的流变行为与反应动力学过程之间的关系，关联聚合物复杂体系多尺度结构流变模型，发展聚合物复杂体系化学流变学理论，并模拟物料在加工流场中的质量、动量与热量输运过程。研究开发高性能高分子材料与制品，如生物质复合材料、聚合物/蒙脱土纳米复合材料、聚烯烃改性材料、工程塑料改性材料、非线性聚合物导电复合材料等。研究开拓超临界流体辅助加工、RTM、VARTM等聚合物加工成型技术。
部分论著：
周持兴、俞炜，《聚合物加工理论》，科学出版社，北京，2004年6月。
周持兴主编，《聚合物流变实验与应用》，上海交通大学出版社，上海，2003年4月。
Chixing Zhou, Hong Zheng, and Wei Yu, “Digital analysis technology for morphology of polymer chain coils in flow fields”, Chinese Journal of Polymer Science, 2005，23（3）, 285-291.
Wei Yu, Chixing Zhou, M. Bousmina, “Theory of morphology evolution in mixtures of viscoelastic immiscible components”，Journal of Rheology, 2005, 49 (1), 215-236.
Defeng Wu, Chixing Zhou, Wei Yu, Fan Xie, “Effect of flocculated structure on rheology of poly(butylene terephthalate)/clay nanocomposites” Journal of Polymer Science Part B: Polymer Physics, 2005, 43 (19): 2807-2818
Fan Xie, Chixing Zhou, Wei Yu, Defeng Wu, “Reaction kinetics study of asymmetric polymer–polymer interface”, Polymer, 2005, 46, 8410–8415.
Mengge Liu, Wei Yu, Chixing Zhou, Jinghua Yin, “Conversion measurement in polyethylene/peroxide coupling system under steady shear flow”, Polymer, 2005, 46, 7605–7611.
Hong Zheng, Chixing Zhou, Wei Yu and Hongbin Zhang, “Numerical Simulation of Fiber Spinning Process with Structure Evolution of Polymer Chains”, Research Journal of Textile and Apparel 2006, 10(1), 14-25.
Tian JH, Yu W, Zhou CX, “The preparation and rheology characterization of long chain branching polypropylene”, Polymer, 2006, 47 (23), 7962-7969.
Yu W, Zhou CX, “A simple constitutive equation for immiscible blends”, Journal of Rheology, 2007, 51 (2), 179-194.
Li RM, Yu W, Zhou CX, “Investigation of phase separation in a partially miscible polymer blend by rheology”, Journal of Macromolecular Science Part B-Physics, 2007, 46 (5), 1051-1062.
Liu JY, Yu W, Zhou CX, “Evaluation on the degrading behavior of melt polyolefin elastomer with dicumyl peroxide in oscillatory shear flow by Fourier transform rheology”, Polymer, 2008, 49(1), 268-277.