Table 3.

Glass transition temperature, melting temperature, heat of fusion values, and degree of crystallinity of poly(ɛ-caprolactone), poly(propylene adipate), and their copolymers

Sample	Tg (°C)	Tm1 (°C)	Tm2 (°C)	ΔHm (J/g)	Xc (%)*
PCL	−68.2	54.8	58.1	68.66	55.1
PPAd/PCL 10/90	−67.8	51.0	55.7	66.73	46.2
PPAd/PCL 20/80	−65.9	49.2	53.9	57.41	42.4
PPAd/PCL 30/70	−64.4	40.0	48.7	56.98	37.7
PPAd/PCL 55/45	−64.8	32.0	43.3	47.65	24.5
PPAd/PCL 65/35	−64.3	21.9	36.1	44.93	12.4
PPAd/PCL 85/15	−62.5	−2.9	12.8	7.09	8.5
PPAd	−56.1	31.1	41.8	35.93	26.8

^*Note: Calculated from wide angle X-ray diffraction patterns.

Abbreviations: ΔH_m, heat of fusion, PCL, poly(ɛ-caprolactone); PPAd, poly (propylene adipate); T_g, glass transition temperature; T_m, melting temperature; X_c, degree of crystallinity. ^{10 20 30}