Nghiên cứu tổng hợp poly(l-lactide) trọng lượng phân tử cao bằng kỹ thuật trùng hợp mở vòng

• Tác giả: Đăng Sáng Hoàng, Ngọc Lân Phạm, Minh Quỳnh Trần
• Ngôn ngữ: vie
• Ký hiệu phân loại: 677.2 Textiles of seed-hair fibers
• Thông tin xuất bản: Hóa học, 2012
• Mô tả vật lý: 763-766
• Bộ sưu tập: Metadata
• ID: 637289

Tóm tắt

Different poly(L-lactide), PLLA powders were synthesized by ring opening polymerization under vaccum with the presence of stannous actanoate as a catalyst. Degree of polymerization was investigated with initial ratio of catalyst and monomer, as well as reaction time. Molecular structure of the synthesized PLLA were characterized with capilary viscometer, FT-IR and H-NMR. The results revealed a rather high molecular weight PLLA of 25.000 g/mol has been obtained after 24 hours reaction. Themal stability of this typical PLLA was also analysed using DSC and TGA.