Woyuan Li

Title: Innovations of Woyuan Li: Pioneering Polyphenylene Sulfide Resins

Introduction

Woyuan Li, an accomplished inventor based in Shaoxing, China, has made significant contributions to the field of chemistry through his innovative patents. With a total of three patents to his name, Li has demonstrated a commitment to advancing material science, particularly in the development of polyphenylene sulfide resins.

Latest Patents

Li's latest patents include a groundbreaking preparation method of polyphenylene sulfide resin. This method utilizes a sulfur-containing compound, an alkaline substance, and p-dichlorobenzene as raw materials, coupled with a fatty acid as a polycondensation aid. The process leads to the efficient production of a primary polyphenylene sulfide, which undergoes further reaction with a terminal-group adjusting agent at high temperatures. This innovative method results in a polyphenylene sulfide resin characterized by high reactivity, high melting crystallization temperature, and excellent thermal stability. The resin created can be efficiently used in extrusion and injection molding processes, offering a high yield and reduced costs.

Additionally, Woyuan Li has developed a preparation method for 4-phenylthio-benzenethiol. This environmentally friendly process involves utilizing phenyl sulfide in a halogenation reaction to produce 4-halophenyl sulfide. Following this, a sulfhydrylation reaction leads to the formation of 4-phenylthio-phenylthiolate, which is then acidified. Notably, this method avoids the use of harmful materials such as thiophenol, promoting the efficient recycling of materials and minimizing environmental impact, thus marking it as a green process.

Career Highlights

Throughout his career, Woyuan Li has been associated with well-respected organizations such as Zhejiang Nhu Company Ltd. and Zhejiang University. His roles in these institutions have provided him with the platform to innovate and research, significantly contributing to his field.

Collaborations

Li has collaborated with notable coworkers like Hong Yin and Zhirong Chen. These collaborations have likely fostered an environment of creativity and advancement in their shared field of research and development.

Conclusion

Woyuan Li exemplifies the innovative spirit through his dedication to enhancing material science. His patents not only reflect his deep understanding of chemical processes but also his commitment to sustainable practices in research and development. As innovation continues to evolve, Woyuan Li undoubtedly remains a key figure in the advancement of polyphenylene sulfide resins and their applications in various industries.