Poly(vinyl alcohol): Physical Approaches to Designing Biomaterials for Biomedical Applications

Table 4

Glass transition (𝑇_𝑔) and melting temperatures (𝑇_𝑚) of different crosslinked materials of PVA 10%, 20%, and 30% (w/v) blends of PVA 10% (w/v) with PVP 5% (w/v) and gelatin 5% (w/v) after a single freeze-thaw cycle. The 𝑇_𝑔 and 𝑇_𝑚 were obtained from the second cycle.

DSC RESULTS
Sample name		(𝑇𝑔°C)	(𝑇𝑚°C)
Commercial PVA granules		69.6	226.2
Air-dried (AD)	10% PVA	74.25	228.1
	20% PVA	61.1	220.6
	30% PVA	58.0	226.4
Air-dried and one cycle freeze thawed (AD+1FT)	10% PVA	75.2	226.5
	20% PVA	67.3	225.0
	30% PVA	61.1	222.2
One cycle freeze thawed (1FT)	10% PVA	73.4	227.0
	20% PVA	72.4	226.8
	30% PVA	70.5	227.0
10% PVA and 5% PVP blend (1FT)	0% PVA	148.5	No peak
	25% PVA	112.7	208.6
	50% PVA	109.0	220.9
	75% PVA	94.9	225
10% PVA and 5% gelatin blend (1FT)	80% PVA	75.6	226.0
	60% PVA	75.3	224.2
	40% PVA	69.3	220.5
	20% PVA	74.7	218.2
	0% PVA	190.7	No peak