The Effects of Copper Oxides on the Curing Behaviors of Bismaleimide Triazine Prepreg

Abstract

The effect of copper oxides on the curing behaviors of the bismaleimide triazine (BT) prepreg is studied with infrared spectroscopy (IR), attenuated total reflection infrared spectroscopy (ATR), and X‐ray photoelectron spectroscopy (XPS). The result of IR analyses indicates that there is a concentration distribution present in the prepreg surface layer and the outer surface layer contains less cyanate, imide, and epoxide but more triazine groups than the inner layer. From ATR, it is concluded that the cuprous oxide attracts more cyanate ester resins but less bismaleimide resins from the prepreg to its surface than the cupric oxide. The copper surface affects the curing extent of the BT resin in contact and the cupric oxide has a more pronounced effect than the cuprous oxide, and this surface effect can extend to at least two microns deep into the BT prepreg from the contacted interface. The XPS results confirm that the BT/CuO interface contains more thermally stable and polar functional groups than the BT/Cu2O interface, and both two copper oxides attract only a small amount of brominated epoxy resin onto their surfaces. These results are attributed to the difference in preferential adsorptions and catalytic curing effects of two copper oxides on the BT prepreg in contact. The intensity changes of IR bands obtained from BT prepreg during cure.magnified imageThe intensity changes of IR bands obtained from BT prepreg during cure.

In-situ Coating of Cathode by Electrolyte Additive for High-voltage Performance of Lithium-ion Batteries

“…3b). It shows that the peaks (dotted line indicated) in the BMP-containing cells around 288.4 eV are attributed to the bond from NC¼O in bismaleimide [19,21].…”

Catalytic effects of copper oxides on the curing and degradation reactions of cyanate ester resin

“…18 Various different catalytic curing reactions that occur on the copper surface are reported elsewhere also. [19][20][21][22] It was shown previously that the cuprous oxide attracted more cyanate ester but less bismaleimide resins from the prepreg to its surface than the cupric oxide; the copper surface affected the curing extent of the bismaleimide triazine (BT) resin in contact and the effect of cupric oxide was more significant than that of the cuprous oxide. 22 In addition to the effects on the cure, copper could catalyze the degradation reaction of various polymer resins.…”

Curing behavior and mechanical properties of hollow glass microsphere/bisphenol a dicyanate ester composites

“…It has been reported that transition metallic ions such as Al +3 show strongly catalytic effects to the polycyclomerization of cyanate ester due to their low coordination number and high ligand mobility during the cure process 9. In addition, some metal oxides, such as ZnO,10 TiO 2 ,11 CuO, Cu 2 O,12 silicate13, 14 also have catalytic effects to the polycyclomerization of cyanate ester. The main components of the HGS are SiO 2 and Al 2 O 3 .…”