本课题针对常规剪切形变支配的成型方法成型加工 UHMWPE 过程中喂料困难、输运稳定性差、材料降解严重 等问题，开发出正位移输运与塑性耗散熔融塑化相协同的拉 伸形变支配 UHMWPE 短流程塑化输运技术，解决了短历程 固体输送过程的压实排气、正位移输运与塑性耗散熔融塑化 相协同等问题，实现 UHMWPE 的短流程熔融塑化及高速挤 出，解决高速挤出熔体破裂问题；基于分子链结构设计形成 了短支链 UHMWPE 的合成方案及分子量大小、支链长度等 的控制方法；通过拉伸分散界面结构控制的功能化调控技 术，实现了极高粘度 UHMWPE 的功能 化改性，提高 UHMWPE 制品性能的同时拓宽其应用范围；研究了拉伸形 变支配多外场耦合作用下 UHMWPE 制品多层次形态结构的 形成与演化机制，探明产品性能对不同热机械历史的响应规 律，为通过成型过程调控产品服役性能提供依据； 研究偏心转子熔融塑化输运机械系统的运动学、动力学，研 制出能够精准输出同轴自转和公转且能承受 UHMWPE 加 工中产生的轴向重载和偏心载荷的驱动与传动系统，满足 UHMWPE 及功能化体系塑化输运的需要。 通过课题研究，丰富和发展了 UHMWPE 短热机械历程塑化 挤出新理论，形成了最高产能超过 160kg/h 的四种尺寸系列 的拉伸流变支配的偏心转子挤出机，形成了 UHMWPE 棒材、 管材、板/片材、异型材及线材生产示范线。

Because of the problems such as difficult feeding, poor transport stability, and severe material degradation in the UHMWPE forming process dominated by conventional shear deformation, this topic developed a short process plasticizing transport technology dominated by extension deformation is coordinated with positive displacement transport and plastic dissipation melting plasticization. The problems such as compaction exhaust, the synergistic effect of positive displacement transport and plastic dissipative melt plasticization in the short-term solid conveying process have been solved. The short process of melting plasticization and high-speed extrusion of UHMWPE was realized, and the problem of melt fracture in high-speed extrusion was solved. The synthesis scheme of short branched UHMWPE and the control methods of molecular weight and branched-chain length were formed based on the design of molecular chain structure. The functional modification of ultra-high viscosity UHMWPE was realized through the functional control technology of extension dispersion interface structure control, which improved the properties of UHMWPE products and broadened their application range. The formation and evolution mechanism of the multi-layer morphological structure of UHMWPE products under the coupling effect of multiple external fields dominated by extension deformation was studied, and the response law of product properties to different thermo-mechanical history was explored, providing a basis for regulating product service performance through forming process. The kinematics and dynamics of eccentric rotor melt plasticizing transport mechanical system were studied, and the drive and transmission systems which can accurately output coaxial rotation and revolution, and can withstand axial heavy load and eccentric load produced in UHMWPE processing were developed to meet the needs of UHMWPE and functional plasticizing transport system. Through the subject research, enrich and develop the UHMWPE short thermo-mechanical history plasticizing extrusion new theory, and develop an eccentric rotor extruder dominated by elongation rheology with the maximum capacity of more than 160kg/h. And UHMWPE bar material, pipe material, plate/sheet material, profiled material and wire material production lines.