Functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments

a technology which is applied in the field of functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments, can solve the problems of preventing efficient chemistry from being performed between sheets of aromatics, increasing manufacturing costs, and high density, so as to improve the mechanical properties, improve the blending of matrix, and improve the effect of material properties

Inactive Publication Date: 2019-09-12
EXXON RES & ENG CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent is about using special molecules with rigid backbones and kinked segments to improve the properties of materials. Specifically, the disclosure describes methods for using these molecules to prevent a compact arrangement between precursor polymers during carbon fiber manufacture, to separate and link π-π stacked aromatic systems, to stabilize composite materials, and to achieve better mechanical properties in carbon fibers. The disclosure also includes methods for producing hollow carbon fiber materials with better strength and balance between strength / stiffness and toughness, as well as with different pore size distributions.

Problems solved by technology

However, the airflow within the precursor polymer fibers may be hindered because of a compact arrangement between the precursor polymers, and this consequently increases the manufacture cost.
Such strong interactions also lead to higher density and prevent efficient chemistry from being performed between sheets of aromatics.

Method used

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  • Functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments
  • Functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments
  • Functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0063]2. The method , wherein the system is a system for preparing carbon fibers.

[0064]3. The method according to embodiments 1-2 further comprising polymerizing functional monomers with rigid backbones and kinked segments alone or as a component to form a precursor polymer;

spinning the precursor polymer to form precursor fibers;

cross-linking the precursor polymers to stabilize the precursor fibers; and

carbonizing or graphitizing the cross-linked precursor fibers to form carbon fibers.

[0065]4. The method according to embodiments 1-2 further comprising polymerizing functional monomers with rigid backbones and kinked segments alone or as a component to form a precursor polymer;

spinning the precursor polymer to form precursor fibers;

cross-linking the precursor polymers to stabilize the precursor fibers through functional groups on the functional monomers; and

carbonizing or graphitizing the cross-linked precursor fibers to form carbon fibers.

embodiment 4

[0066]5. The method , wherein the precursor polymers are cross-linked through functional groups on the functional monomers by click chemistry.

[0067]6. The method according to embodiments 1-2 further comprising polymerizing functional monomers with rigid backbones and kinked segments;

blending the polymers from the polymerization step with other carbon fiber polymer precursors to form a precursor polymer mixture;

spinning the precursor polymer mixture to form precursor fibers;

cross-linking the precursor polymer mixture to stabilizer the precursor fibers; and carbonizing or graphitizing the cross-linked precursor fibers to form carbon fibers.

embodiment 2

[0068]7. The method , wherein the functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments have the following general chemical structure:

wherein:

in all structures the carbon indicated by “C” denotes a spiro carbon;

A1 and A2 are each independently selected from:

A3 is a selected from substituted or unsubstituted C5-C6 aryl, substituted or unsubstituted C5-C6 heteroaryl, substituted or unsubstituted C5-C6 cycloalkyl and substituted or unsubstituted C5-C6 cyclic heterocycloalkyl;

X is —CH2, —C═O, —O—, or —N—R6;

R1, R2, R3, and R4 are each independently selected from H and Y—Z;

R5 represents the linking point to other segments;

R6 is independently at each occurrence selected from H, substituted or unsubstituted alkyl, substituted or unsubstituted heteroalkyl, substituted or unsubstituted aryl, and substituted or unsubstituted heteroaryl;

Y is independently absent or selected from substituted or unsubstituted alkyl, substituted or unsubstituted ...

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Abstract

The present disclosure relates to methods for using functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments to alter the interactions between molecules, and consequently improve / modify the properties of materials. In particular, the disclosure provides methods for using functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments as (1) precursors for carbon fiber, (2) “molecular agents” to separate and / or link π-π stacked aromatic systems, 3) stabilizers in composite materials to achieve better blending of matrix with fiber reinforcement, and / or (4) one of the components in carbon fibers to achieve better mechanical properties.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application No. 62 / 685,535 filed Jun. 15, 2018, and U.S. Provisional Application No. 62 / 640,253 filed Mar. 8, 2018, which are herein incorporated by reference in their entireties.FIELD[0002]The present disclosure relates to methods for using functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments to alter the interactions and / or arrangements between molecules, and consequently improve and / or modify the properties of materials. In particular, the disclosure provides methods for using functional molecules and other structural carbon-based molecules with rigid backbones and kinked segments as, for example, (1) precursors for carbon fiber, (2) “molecular agents” to separate and / or link π-π stacked aromatic systems, 3) stabilizers in composite materials to achieve better blending of matrix with fiber reinforcement, and / or (4) one of the compo...

Claims

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Application Information

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IPC IPC(8): D01F9/21D01F11/14
CPCD01F11/14D01F9/21C08J5/10C01B32/168B01D67/0067B01D71/021D01F1/10D01F9/14C01B32/194B01D69/08Y10T428/2975
InventorMARLER, DAVID O.RAJAGOPALAN, SRINIVASANBHANDARI, DHAVALZHOU, HUAXINGFINN, M. G.
OwnerEXXON RES & ENG CO