Starch-based biodegradable combination as well as preparation method and application thereof
A technology of biodegradation and biopolymer, which is applied in the field of starch-based biodegradable compositions, can solve the problems of poor compatibility and the decline of mechanical properties of products, and achieve the effect of good processing performance and cost reduction
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Embodiment 1
[0043] Embodiment 1: Preparation of glyceryl malate (DGMA)
[0044] 1.34kg of malic acid and 1.84kg of glycerol are placed in a 5L reactor equipped with a water separator, and N 2 The reaction was stirred at 130-140°C for 15 hours, 0.4 kg of water was separated, the acid value was less than 3%, and a colorless and transparent viscous liquid DGMA was obtained.
Embodiment 2
[0045] Embodiment 2: Preparation of glyceryl tartrate (DGTA)
[0046] 1.50kg tartaric acid, 1.84kg glycerin are placed in the 5L reactor that water separator is equipped with, logical N 2 The reaction was stirred at 140-160°C for 8 hours, 0.4 kg of water was separated, the acid value was less than 3%, and a colorless and transparent viscous liquid DGTA was obtained.
Embodiment 3
[0047] Example 3: Preparation of compatibilizer polyglyceryl sebacate (PGS)
[0048] 2.06kg sebacic acid, 0.92kg glycerin are placed in the 5L reactor that water trap is equipped with, logical N 2 Stir and react at 140-160°C for 18 hours to obtain a colorless and transparent viscous resin PGS with a number average molecular weight of 8600, a weight average molecular weight of 34000 and a dispersion degree of 3.95.
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