The Synthesis And Characterizations Of Degradable Polymeric Materials

As the most widely applied polymeric materials, plastics have penetrated intonearly every aspect of the modern life. Due to their non-degradability, however, a greatdeal of scraped plastics brings the white pollution which threatens the naturalenvironment and endangers people's health. The degradability of materials has becomea focus of study in recent years. Degradable materials can be divided intobiodegradable plastics and photodegradable plastics. The development of newbiodegradable plastics is of great significance for the future development of degradableplastics.In this thesis, monomer with unsaturated double bond was firstly synthesized byreacting acryloyl chloride with bifunctional monomer. Such synthesized monomer ormonomer with initial unsaturated double bond was used to prepare linear polymericmaterials by free radical polymerization. A series of new degradable space polymerswith acylamino bond were subsequently synthesized using diisocyanate as thecross-linker. The synthesized polymers were characterized by ¹H NMR, ¹³C NMR andFT-IR. The degradability of polymers was investigated by scanning electronmicroscopy (SEM) and thermo-gravimetric analysis (TGA). Results showed that thetype and the ratio of the cross-linker had remarkable effect on the characteristics of theresulting polymers. All synthesized polymers possessed the characteristics of thermaldegradation, photodegradation and biodegradation.The content of hydroxyl or amino groups in polymers synthesized in this thesiscould be changed by adjusting the amount of the cross-linker or by using differentmonomer. By modification such functional groups with other active monomer, thecharacteristics of the polymers can be modified. As a result, the application fields ofthe polymers could be widely expanded. The synthesized polymers might have potential applications as functionally degradable materials.