Blends aliphatic polyesters

Aliphatic polyesters are best known for their comparable properties to existing petroleum-based polymers biodegradability and resistivity to 

The toughness of PLA has been reported to be improved by blending it with polyethylene glycol (PEG) with variable molecular weights [69]. Mahapatra et al. have also reported on the preparation of plastcized PLA [70]. However, the authors reported that the compatibility and molecular 

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Determination of B for a series of blends made it possible to establish empirical rules for the observed miscibilities. Thus, for example, Prud homme [1982] reported systematic variation of miscibility in a series of halogenated polymer/ aliphatic polyester blends. The highest miscibility was observed for the chlorinated polymer, e.g., PVC, and the lowest for the fluorinated, PVF, with the brominated, PVB, having an intermediate behavior. Furthermore, when the chlorinated polymer was mixed with a series of polyesters, the highest miscibility was found when the ratio of the -CH - to -COO- groups reached an optimum value. This optimum value depended on the chemical nature of the halogenated polymer — as shown in Figure 2.7, for PVDC blends with aliphatic polyesters this value is 5 to 6. 

Figure 2.7. The binary interaction parameter B for PVDC/aliphatic polyester blends plotted as a function of the number of -CHj -groups per one ester -COO- group in the latter polymer. Data from [Woo et al., 1986],...

Buchanan, C.M., Boggs, C.N., Dorschel, D., Gardner, R.M., Komarek, R.J., Watterson, T.L., and White, A.W., 1995, Composting of miscible cellulose acetate propionate-aliphatic polyester blends, y. Environ. Polym. Degrad, 1-11. 

Alkylated Kraft Lignin-Aliphatic Polyester Blends... 

Woo E M, Barlow J W and Paul D R (1985) Thermodynamics of the phase behaviour of poly(vinyl chloride)/aliphatic polyester blends, Polymer 26 763-773. 

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