Preparation of Degradable Polymenthide and Its Elastomers from Biobased Menthide via Organocatalyzed

• 作 者: Na Zhao Xin-Xin Cao Jin-Feng Shi Zhi-Bo Li
• 机 构: Key Laboratory of Biobased Polymer Materials, Shandong Provincial Education Department, College of P
• 出 处: 高分子科学（英文版）
• 发表日期: 2020年10期
• 关键词: Polyester elastomer Cyclic trimeric phosphazene base Ring-opening polymerization

Development of degradable polyester elastomers plays an important role in the applications of soft mateirals.Noncrystalline polymenthides (PMs) from menthol derived lactone monomers are excellent soft segments for preparing degradable polyester elastomers.By using cyclic trimeric phosphazene base (CTPB) as an organocatalyst,we successfully synthesized PMs with different molecular weights (8.2 kDa to 100.7 kDa) in high yields via ring-opening polymerization (ROP) of menthide.When a CTPB/urea binary catalytic system was adopted,the polymerizations proceeded in a more controlled manner.Using glycerol as initiator,star shaped PMs with well-defined structure were synthesized and subsequently end-capped by acrylate.UV irradiation of the terminal acrylate groups in the star-shaped PMs resulted in formation of chemically cross-linked polyester elastomers without heat or other stimuli.The obtained polyester elastomers exhibit matched modulus (3.8-5.5 MPa),tensile strength (0.56-0.68 MPa),and strain at break (280％-320％) with soft body tissues,displaying great potential in biomedical applications.