PLA-AMPOSS nano-hybrid particles were synthesized by in-situ polymerization of one (3-amino) propyl 7-isobutyl cage siloxane (AMPOSS) and lactide (D,L-LA) under the action of Sn(Oct)2,and their structures were characterized by FT-IR and 1H-NMR.Then it was mixed with polylactide (PLA) solution to synthesize PLA/PLA-AMPOSS nanocomposites,and the thermal stability and mechanical properties of the composites were analyzed and tested.FT-IR and 1H-NMR spectra showed that AMPOSS had open-loop copolymerization with D,L-LA,and oligopolyllactide was successfully grafted to the surface of AMPOSS.The TGA curve of the composite showed that the mixing of PLA-AMPOSS did not change the degradation mechanism of polylactide resin,and the thermal stability of the matrix was enhanced.The mechanical properties test results showed that the introduction of PLA-AMPOSS could enhance and toughen the polylactide resin.When the introduction content was 10% and 15%,the tensile strength and elongation at break of the composite were the largest,respectively,at 34.6MPa and 4.8%.
Li Ruzhen, Ma Wensheng
. Synthesis of PLA-AMPOSS and its composite by modification of polylactide resin with AMPOSS[J]. New Chemical Materials, 2021
, 49(6)
: 79
-82
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.018
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