Prepolymerization of Lacquer Sap under Pure Oxygen Atmosphere and Its Effects on the Properties of Lacquer Film

Figure 5

SEM photographs of the raw lacquer film ((a) magnification: 1.00 Kx; (b) magnification: 3.00 Kx) and the prepolymerization lacquer film after 3.0 h ((c) magnification: 1.00 Kx; (d) magnification: 5.00 Kx).

(a)

(b)

(c)

(d)