USA As Represented by Secretary of the Navy

Bernadette A Higgins

R Andrew McGill

Duane L Simonson

Michael Papantonakis

Viet K Nguyen

Jennifer L Stepnowski

Disclosed herein is a composition having a plurality of particles of a filler material and crosslinking units having the formula &#x2014;(SiR&#x2014;CH&#x2014;CH&#x2014;CH)&#x2014;. The silicon atom in the crosslinking unit is directly or indirectly bound to the filler material. Each R is alkyl, alkenyl, phenyl, methyl, ethyl, allyl, halogen, chloro, or bromo. Also disclosed herein is a filler material having the silicon atom of a silacyclobutane group is directly or indirectly bound thereto. Also disclosed herein is a method of crosslinking silacyclobutane groups bound to a plurality of particles of a filler material. The silicon atom of the silacyclobutane group is directly or indirectly bound to the filler material. Also disclosed herein is a composition including a plurality of fibers of a polymer having reactive oxygen atoms and siloxane groups. Coordination bonds are formed between the oxygen atoms and the silicon atoms of the siloxane groups of separate fibers.

Fiber reinforcement with 1-silacyclobutane crosslink units

Disclosed herein is a composition having: a polymer having a carbosilane or siloxane backbone and pendant hydrogen-bond acidic groups; and a filler material having polar groups. The polymer is not covalently bound to the filler material.

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Alexandria, VA, United States of America

Bernadette A Higgins