Variable viscosity solventless prepolymer formulation
This invention relates to a prepolymer formulation comprising dicyclopentadiene that is at least 92% pure wherein the prepolymer formulation is flowable at ambient temperatures by virtue of the addition of a reactive ethylene monomer to the formulation.
1. A method of fabricating a polymeric composite reinforced construct, comprising:
depositing onto the construct a prepolymer composition comprising dicyclopentadiene that is at least 92% pure, a reactive ethylene monomer and a ruthenium curing catalyst, wherein:
the reactive ethylene monomer comprises a weight percentage of the total monomer content such that the prepolymer composition has a desired viscosity at ambient temperature;
the prepolymer composition is deposited onto the template at ambient temperature;
the prepolymer composition further comprises a reinforcing material embedded therein, wherein
the reinforcing material is embedded in the prepolymer composition prior to deposition of the composition onto the construct or the prepolymer composition is deposited onto the construct after the reinforcing material has been deposited thereon; and
curing the deposited prepolymer composition at ambient temperature to form the polymeric composite reinforced construct.
2. The method of claim 1 , wherein the reactive ethylene monomer comprises from about 1 wt % to about 10 wt % of the total monomer content.
3. The method of claim 2 , wherein the reactive ethylene monomer comprises from about 4 wt % to about 6 wt % of the total monomer content.
4. The method of claim 1 , wherein the reactive ethylene monomer comprises unsubstituted or substituted norbornene.
5. The method of claim 4 , wherein the substituted norbornene is a 5-alkyl norbornene.
6. The method of claim 5 , wherein the 5-alkyl moiety is selected from the group consisting of 1C-12C straight or branched chain alkyls.
7. The method of claim 6 , wherein the straight chain alkyl is selected from hexyl or decyl.
8. The method of claim 1 , wherein the polymeric composite reinforcing material comprises a fibrous, filamentous or any combination thereof, reinforcing material.
9. The method of claim 8 , wherein the fibrous or filamentous reinforcing material is selected from the group consisting of glass, carbon, aramid and ultra-high molecular weight polyethylene.
10. The method of claim 8 , wherein the reinforcing material comprises 10 vol % to 90 vol % of the prepolymer composition.
11. A construct fabricated using the method of claim 1 .
12. The construct of claim 11 , wherein the construct is a pressure vessel.