Thermal Stabilization of Polyoxymethylene by PEG-Functionalized Hydroxyapatite: Examining the Effects of Reduced Formaldehyde Release and Enhanced Bioactivity

Table 4

Temperature, heat of melting, supercooling, and degree of crystallinity of POM/HA-g-PEG composites (during first heating and second heating cycles).

Sample	[°C]	Heat of phase transition of POM/HA-g-PEG [J/g]	POM heat of melting [J/g]	Supercooling [°C]	Degree of crystallinity [%]
POM	165.8	159.5	159.5	19.1	48.9
POM/1.0% HA-g-PEG 600	168.5	159.6	159.6	21.2	49.4
POM/5.0% HA-g-PEG 600	166.5	150.9	150.9	18.0	48.7
POM/1.0% HA-g-PEG 2000	166.3	157.7	157.7	19.1	48.3
POM/5.0% HA-g-PEG 2000	168.5	149.2	149.2	20.3	47.0
POM/1.0% HA-g-PEG 6000	167.5	158.9	158.9	18.7	49.0
POM/5.0% HA-g-PEG 6000	165.8	149.8	149.8	17.8	48.4
POM	167.0	170.9	170.9	20.3	52.4
POM/1.0% HA-g-PEG 600	167.6	166.7	166.7	20.2	51.6
POM/5.0% HA-g-PEG 600	167.4	160.2	160.2	18.9	51.7
POM/1.0% HA-g-PEG 2000	167.0	169.9	169.9	19.7	52.6
POM/5.0% HA-g-PEG 2000	167.3	159.7	159.7	19.1	51.5
POM/1.0% HA-g-PEG 6000	166.2	171.8	171.8	17.4	53.2
POM/5.0% HA-g-PEG 6000	168.5	160.3	160.3	20.5	51.7