粉状脲醛树脂具有复水性能差的缺点，影响其使用、限制专业化胶黏剂生产企业的出现。本项目在分析粉状脲醛树脂复水性能差的原因基础上，将星型超亲水聚合物引入，用于提高粉状脲醛树脂的复水性能。利用原子转移自由基聚合法合成具有星型结构、超亲水性能的聚合物。利用溶胶-凝胶法制备掺杂TiO2的星型超亲水聚合物。对反应条件进行优化、聚合物结构表征、合成机理分析、超亲水性能检测。将星型超亲水聚合物作用于粉状脲醛树脂进行复水试验，建立复水模型，分析复水机理。最后分析聚合物加入对脲醛在木材中使用性能的影响。本研究旨在利用星型超亲水聚合物提高粉状脲醛树脂的复水性能，为粉状脲醛树脂的专业化生产奠定基础。

The poor rewatering of powdered urea-formaldehyde resins has limited the use and the establishment of specialized adhesive production companies. Based on the factors that affect the rewatering of powdered urea-formaldehyde resins, this proposal will introduce star super-hydrophilic polymers to improve the rewatering. The polymer with star structure and super-hydrophilicity will be synthesized by Atom transfer radical polymerization (ATRP). The polymer doped with TiO2 will be also prepared by sol-gel method. The reaction conditions will be optimized. The polymer structure, synthesis mechanism and super-hydrophilicity will be detected. Star super-hydrophilic polymer will be applied to the rewatering test of the powdery urea -formaldehyde resins, and the rewater dissolution models will be established to analyze the rewatering mechanism. Finally, the effect of polymer addition on the performance of urea formaldehyde used in wood will be analyzed. The purpose of this study is to use star super-hydrophilic polymer to improve the rewatering of urea-formaldehyde powder, which will lay the foundation for the specialized production of powdery urea-formaldehyde.