FILM FORMED FROM A BLEND OF BIODEGRADABLE ALIPHATIC-AROMATIC COPOLYESTERS

摘要

different aliphatic-aromatic copolyester film is provided formed from biodegradable polymer blends of polyester It is. More particularly, the blend contains the first copolyester formed from terephthalic acid monomer. The use of terephthalic acid monomers are generally linear structures (for example, ~ 180 ) 1,4- linked to (p -) results in a polymer chain containing a terephthalate unit. Also contain an aromatic co-polyester-blend formed from a second aliphatic acid and / or isophthalic acid monomers. The use of such a monomer is 1,2 (ortho -) and / or 1,3- (meta-) to produce a polymer chain containing units connected. 1,2 (ortho -) and / or 1,3- (meta-) if inclusion of the polymer into the main chain of the copolyester of the second unit is connected or not, or each, bending position, into the linear polymer chain, (for example, ~ 120 bending position by 1, 3-bond) is introduced. 'Bending position' in the main chain, the second copolyester has crystallinity, and its physical properties thereof reduces the melt viscosity affects (e.g., rigidity, tensile strength, and the crystallization rate). Thus, the properties of the second copolyester are practically different from those of the first copolyester. In this regard, the 'bending position' the second copolyester is superior than can be achieved using only one of the two co-polyester alone, it is possible to provide the flexibility to form a film having a wide range of properties. ;