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Blending starch with polybutylene succinate can not only reduce the cost of the product, but also endow the product with complete biodegradability.
However, the unplasticized starch contains a large number of hydrogen bonds between and within the molecule, resulting in The mobility of starch molecular chains is poor.
If this kind of starch with poor fluidity and hydrophilicity is directly blended with polybutylene succinate with good fluidity and hydrophobicity, it will easily lead to incompatibility of the two phases of the material
.
Yang Jinghui et al.
prepared polybutylene succinate-based fully biodegradable material and its preparation method, using thermoplastic phosphate starch masterbatch, using low-cost hyperbranched polyester as a reaction-type assistant to improve the thermoplasticity and fluidity of starch At the same time, the compatibility and toughness of starch and polybutylene succinate are improved
.
Among them, the dendritic aliphatic polyester is Perstorp, Bolrotn@H40
.
The function is described as follows: 1.
It has a dense and non-crosslinked polyester branch structure, which is easy to undergo transesterification reaction with polybutylene succinate in the molten state to obtain better compatibility
.
2.
The abundant hydroxyl groups on the surface of hyperbranched polyesters are prone to hydrogen bonding with the hydroxyl groups of starch molecular chains, weakening the effect of the intermolecular and intramolecular hydrogen bonds of starch, and improving the dispersibility and fluidity of starch.
3.
Hyperbranched polyesters The cavity structure in the molecule can absorb impact energy and improve the toughness of the material
.
However, the unplasticized starch contains a large number of hydrogen bonds between and within the molecule, resulting in The mobility of starch molecular chains is poor.
If this kind of starch with poor fluidity and hydrophilicity is directly blended with polybutylene succinate with good fluidity and hydrophobicity, it will easily lead to incompatibility of the two phases of the material
.
Yang Jinghui et al.
prepared polybutylene succinate-based fully biodegradable material and its preparation method, using thermoplastic phosphate starch masterbatch, using low-cost hyperbranched polyester as a reaction-type assistant to improve the thermoplasticity and fluidity of starch At the same time, the compatibility and toughness of starch and polybutylene succinate are improved
.
Among them, the dendritic aliphatic polyester is Perstorp, Bolrotn@H40
.
The function is described as follows: 1.
It has a dense and non-crosslinked polyester branch structure, which is easy to undergo transesterification reaction with polybutylene succinate in the molten state to obtain better compatibility
.
2.
The abundant hydroxyl groups on the surface of hyperbranched polyesters are prone to hydrogen bonding with the hydroxyl groups of starch molecular chains, weakening the effect of the intermolecular and intramolecular hydrogen bonds of starch, and improving the dispersibility and fluidity of starch.
3.
Hyperbranched polyesters The cavity structure in the molecule can absorb impact energy and improve the toughness of the material
.