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US 5,844,052 AGranted
Linear metallocene polymers containing acetylenic and inorganic units and thermosets and ceramics therefrom
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsTeddy M. Keller, Eric J. Houser
Life of this patent
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Abstract
Thermally stable thermosets are formed from novel linear polymer containing acetylenic units and a random distribution of organotransition metal complexes, siloxane, boron, and/or carborane-siloxane units formed by crosslinking of the linear copolymers through the acetylene units in the polymer backbone. The thermosets can be used as structural components in high temperature and oxidizing environments or as pyrolytic precursors to metal containing ceramics, ceramic films and fibers having enhanced strength and toughness with superior mechanical, optical, electrical and/or magnetic properties.
Claims21
A thermoset polymer formed by curing a linear polymer consisting of a random distribution of:
- (a) first units of the formula:
- ##STR11## and (b) second units of the formula:
- ##STR12## wherein:
- E represents ##STR13## a, f, g, h, p, q, s, t, k, R.sup.9, R.sup.10, R.sup.11, R.sup.12, and R.sup.13 are variable within said linear polymer;
- a is always greater than or equal to one;
- f is always greater than or equal to zero;
- g is always greater than or equal to one;
- h is always greater than or equal to one;
- p is always greater than or equal to zero and is always greater than or equal to one when q is greater than or equal to one;
- q is always greater than or equal to zero;
- s is always greater than or equal to zero and is always greater than or equal to one when q is greater than or equal to one;
- t is always greater than or equal to zero
- k is always 3 to 16;
- x is always greater than or equal to one;
- R.sup.9, R.sup.10, R.sup.11, R.sup.12 are the same or different and wherein each=H, unsubstituted hydrocarbon moieties or substituted hydrocarbon moieties;
- R.sup.13 =unsubstituted or substituted hydrocarbon moieties;
- R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are the same or different and are selected from the group consisting of H, unsubstituted hydrocarbon moieties, substituted hydrocarbon moieties, and halogen;
- and
- M=Fe, Ru, Os, or a combination thereof;
- said curing being performed by cross-linking said acetylenic units.
17 more elements
An organometallic thermoset polymer comprising a unit represented by the following formula:
- ##STR17## wherein:
- ##STR18## represents a structure consisting of crosslinked acetylenic moieties;
- x is greater than or equal to one;
- z is greater than or equal to one;
- w is greater than or equal to one;
- y is greater than or equal to one;
- a is greater than or equal to one;
- R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are the same or different and are selected from the group consisting of H, unsubstituted hydrocarbon moieties, substituted hydrocarbon moieties, and halogen;
- M=Fe, Ru, Os, or a combination thereof;
- E is selected from the group consisting of;
- ##STR19## f is greater t or equal to zero;
- g is greater than or equal to one;
- h is greater than or equal to one;
- p is greater than or equal to zero and is greater than or equal to one when q is greater than or equal to one;
- q is greater than or equal to zero;
- s is greater than or equal to zero and is greater than or equal to one when q is greater than or equal to one;
- t is greater than or equal to zero
- k=3 to 16;
- R.sup.9, R.sup.10, R.sup.11, R.sup.12 are the same or different and wherein each=H, unsubstituted hydrocarbon moieties or substituted hydrocarbon moieties;
- and
- R.sup.13 =unsubstituted or substituted hydrocarbon moieties;
- said unit including at least one carboranyl group, one or more boranyl groups, or one or more siloxyl groups.
19 more elements
An organomnetallic thermoset polymer comprising a unit represented by the following formula:
- ##STR22## wherein:
- ##STR23## represents a structure consisting of crosslinked acetylenic moieties;
- x is greater than or equal to one;
- z is greater than or equal to one;
- w is greater than or equal to one;
- y is greater than or equal to one;
- a is greater than or equal to one;
- R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7, and R.sup.8 are the same or different and are selected from the group consisting of H, unsubstituted hydrocarbon moieties, substituted hydrocarbon moieties, and halogen;
- M=Fe, Ru, Os, or a combination thereof;
- E is variable throughout said unit and is selected from the group consisting of:
- ##STR24## f is greater than or equal to zero;
- g is greater than or equal to one;
- h is greater than or equal to one;
- p is greater than or equal to zero and is greater than or equal to one when q is greater than or equal to one;
- q is greater than or equal to zero;
- s is greater than or equal to zero and is greater than or equal to one when q is greater than or equal to one;
- t is greater than or equal to zero
- k=3 to 16;
- R.sup.9, R.sup.10, R.sup.11, R.sup.12 are the same or different and wherein each=H, unsubstituted hydrocarbon moieties, or substituted hydrocarbon moieties;
- at least one of R.sup.9, R.sup.10, R.sup.11, and R.sup.12 is present and is H;
- and
- R.sup.13 =unsubstituted or substituted hydrocarbon moieties.
19 more elements
A method of preparing an organometallic thermoset polymer comprising the step of curing a linear polymer consisting of a random distribution of:
- (a) first units of the formula:
- ##STR26## and (b) second units of the formula:
- ##STR27## wherein:
- E represents ##STR28## a, f, g, h, p, q, s, t, k, R.sup.9, R.sup.10, R.sup.11, R.sup.12, and R.sup.13 are variable within said linear polymer,
- a is always greater than or equal to one;
- f is always greater than or equal to zero;
- g is always greater than or equal to one;
- h is always greater than or equal to one;
- p is always greater than or equal to zero and is always greater than or equal to one when q is greater than or equal to one;
- q is always greater than or equal to zero;
- s is always greater than or equal to zero and is always greater than or equal to one when q is greater than or equal to one;
- t is always greater than or equal to zero
- k is always 3 to 16;
- x is always greater tan or equal to one;
- R.sup.9, R.sup.10, R.sup.11, R.sup.12 are the same or different and wherein each=H, unsubstituted hydrocarbon moieties or substituted hydrocarbon moieties;
- R.sup.13 =unsubstituted or substituted hydrocarbon moieties;
- R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5.sub., R.sup.6, R.sup.7, and R.sup.8 are the same or different and are selected from the group consisting of H, unsubstituted hydrocarbon moieties, substituted hydrocarbon moieties, and halogen;
- and
- M=Fe, Ru, Os, or a combination thereof;
- said curing being performed by cross-linking said acetylenic units.
17 more elements
Dependencies are inferred from the claim text.