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US 12,391,780 B2Granted
Network polymers and methods of making and using same
AssigneeThe Regents of the University of Colorado, a body corporate
InventorsChristopher N. Bowman, Matthew K. Mcbride, Brady T. Worrell, Marvin Dion Alim, Robert R. McLeod
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Abstract
The present invention provides in one aspect holographic materials comprising a covalent adaptable networks (CAN) matrix that has exchangeable crosslinks, and at least one writing monomer, wherein upon exposure to a stimulus, the holographic material can undergo photopolymerization and serve as a recording medium.
Claims18
A composition comprising a support matrix and at least one writing monomer,
- wherein the support matrix consists of a covalent adaptable network that is a reaction product of at least one first multifunctional monomer, at least one second multifunctional monomer, and at least one third multifunctional monomer,
- wherein:
- a) the at least one first multifunctional monomer is selected from the group consisting of:
- wherein in (a):
- each occurrence of R is independently selected from the group consisting of H and C1-C10 alkyl;
- each occurrence of n is independently 1, 2, 3, 4, 5, or 6;
- b) the at least one second multifunctional monomer is a compound of Formula (I):
- wherein:
- A is
- R1 is selected from the group consisting of
- wherein the * denotes the point of attachment to A,
- X1 is OH,
- m is an integer from 1 to 100;
- and
- c) the at least one third multifunctional monomer is selected from the group consisting of a straight chain perfluorocarbon diol, a polycaprolactone diol, a poly (tetrahydrofuran) diol, a poly (caprolactone-co-tetrahydrofuran) diol, a poly (ethylene glycol) diol, and a poly (butadiene) diol;
- wherein in the reaction product, the at least one first multifunctional monomer crosslinks at least one second multifunctional monomer and at least one third multifunctional monomer;
- wherein the composition further comprises at least one non-reactive counter diffusant;
- wherein at least a portion of the support matrix is swollen with at least one writing monomer selected from the group consisting of tribromophenyl (meth) acrylate, pentabromophenyl (meth) acrylate, phenylthioethyl (meth) acrylate, naphthylthioethyl (meth) acrylate, tritylthioethyl (meth) acrylate,
- wherein in the at least one writing monomer:
- R1 and R2 are independently selected from the group consisting of:
- x is 1, and R groups marked with ‘*’ and ‘**’ are independently selected from the group consisting of:
- or
- x is 2, and
- each R group marked with ‘*’ is independently selected from the group consisting of:
- and
- each R group marked with ‘**’ is independently selected from the group consisting of:
- and a polymerization initiator.
24 more elements
A method of making a holographic material, the method comprising:
- (a) forming a reaction mixture consisting of:
- (i) at least one first multifunctional monomer selected from the group consisting of
- wherein
- each occurrence of R is independently selected from the group consisting of H and C1-C10 alkyl;
- each occurrence of n is independently 1, 2, 3, 4, 5, or 6;
- (ii) at least one second multifunctional monomer of Formula (I):
- wherein:
- A is
- R1 is selected from the group consisting of
- wherein the * denotes the point of attachment to A,
- X1 is OH,
- m is an integer from 1 to 100;
- (iii) at least one third multifunctional monomer selected from the group consisting of a straight chain perfluorocarbon diol, a polycaprolactone diol, a poly (tetrahydrofuran) diol, a poly (caprolactone-co-tetrahydrofuran) diol, a poly (ethylene glycol) diol, and a poly (butadiene) diol;
- (iv) at least one writing monomer selected from the group consisting of tribromophenyl (meth) acrylate, pentabromophenyl (meth) acrylate, phenylthioethyl (meth) acrylate, naphthylthioethyl (meth) acrylate, tritylthioethyl (meth) acrylate,
- wherein in the at least one writing monomer:
- R1 and R2 are independently selected from the group consisting of:
- x is 1, and R groups marked with ‘*’ and ‘**’ are independently selected from the group consisting of:
- or
- x is 2, and
- each R group marked with ‘*’ is independently selected from the group consisting of:
- and
- each R group marked with ‘**’ is independently selected from the group consisting of:
- and
- (v) at least one of a non-reactive counter diffusant and a polymerization initiator;
- (b) polymerizing the reaction mixture such that the at least one first multifunctional monomer crosslinks the at least one third multifunctional monomer and the at least one second multifunctional monomer to form a covalently bound support matrix,
- wherein the at least one writing monomer is unbound and capable of moving freely within the support matrix and wherein at least a portion of the support matrix is swollen with the at least one writing monomer,
- wherein the polymerizing is through at least one method selected from the group consisting of thermally initiated polymerization, photopolymerization, and redox initiated polymerization;
- (c) optionally, activating the RAFT functionalities in the at least one second multifunctional monomer in order to induce support matrix network rearrangement;
- and
- (d) polymerizing the at least one writing monomer.
27 more elements
Dependencies are inferred from the claim text.