A Novel Approach to Design Chitosan-Polyester Materials for Biomedical Applications

Table 1

Fractionation data for Chitosan-polyester blends obtained at various temperatures. CPL1 blend contains 40 wt% of chitosan. CPLG and CPL2 blends contain 60 wt% of chitosan.

Sample code^a	Weight of the sample (g)	Insoluble in 4% HCOOH fraction (enriched with PLLA) (g/wt%)	Soluble fraction^b (enriched with chitosan) (g/wt%)	Σ weight of fractions (g)	Loss (wt%)
CPLG (60)	1.7030	0.5097/29.9	1.0414/61.2	1.5511	8.9
CPL1 (50)	0.7368	0.5073/68.9	0.1996/27.1	0.7069	4.0
CPL1 (100)	0.9754	0.6074/62.3	0.3340/34.2	0.9414	3.5
CPL2 (100)	1.0647	0.4571/42.9	0.5828/54.7	1.0399	2.3
CPL1 (110)	1.1824	0.7715/65.3	0.3609/30.5	1.1324	4.2
CPL1 (130)	0.8293	0.4985/60.1	0.2314/27.9	0.7299	12.0
CPL2 (130)	1.0644	0.4565/42.9	0.5630/52.9	1.0195	4.2
CPL2 (150)	1.0478	0.4487/42.8	0.5572/53.2	1.0059	4.0

^aIn brackets the temperature of processing of a corresponding mix in extruder is specified.
^bWeight of precipitated with 5% NH₄OH fraction.