Catalyst morphology and dissolution kinetics of self-healing polymers

被引：151

作者：

Jones, AS ^{[1
]}

Rule, JD

Moore, JS

White, SR

Sottos, NR

机构：

[1] Univ Illinois, Dept Theoret & Appl Mech, Urbana, IL 61801 USA

[2] Univ Illinois, Dept Chem, Urbana, IL 61801 USA

[3] Univ Illinois, Dept Aerosp Engn, Urbana, IL 61801 USA

来源：

CHEMISTRY OF MATERIALS | 2006年 / 18卷 / 05期

关键词：

D O I：

10.1021/cm051864s

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The role of the crystal morphology and dissolution kinetics of Grubbs' catalyst on self-healing capability is examined. Self-healing polymers require complete coverage of the crack plane with polymerized healing agent for optimal recovery of mechanical integrity. Lack of catalyst leads to incomplete coverage, partial polymerization, and poor mechanical recovery. Catalyst availability is determined by the competing rates of dissolution of the catalyst and polymerization of the healing agent. First-generation Grubbs' catalyst exists in at least two crystal polymorphs, each with a distinct crystal shape, thermal stability, and dissolution kinetics. The more rapidly dissolving polymorph shows superior healing efficiency when used as the initiator in a self-healing epoxy material based on ring-opening metathesis polymerization of dicyclopentadiene.

引用

页码：1312 / 1317

页数：6

共 31 条

[1] Ruthenium-catalyzed chemoselective N-allyl cleavage: Novel Grubbs carbene mediated deprotection of allylic amines [J].

Alcaide, B ;

Almendros, P ;

Alonso, JM .

CHEMISTRY-A EUROPEAN JOURNAL, 2003, 9 (23) :5793-5799

[2]

Arvidson RS, 2004, AM MINERAL, V89, P51

[3] Retardation and repair of fatigue cracks in a microcapsule toughened epoxy composite - Part II: In situ self-healing [J].

Brown, EN ;

White, SR ;

Sottos, NR .

COMPOSITES SCIENCE AND TECHNOLOGY, 2005, 65 (15-16) :2474-2480

[4] Fracture testing of a self-healing polymer composite [J].

E. N. Brown ;

N. R. Sottos ;

S. R. White .

Experimental Mechanics, 2002, 42 (4) :372-379

[5] Steady-state dissolution kinetics of goethite in the presence of desferrioxamine B and oxalate ligands: implications for the microbial acquisition of iron [J].

Cheah, SF ;

Kraemer, SM ;

Cervini-Silva, J ;

Sposito, G .

CHEMICAL GEOLOGY, 2003, 198 (1-2) :63-75

[6] DISSOLUTION RATES OF POLY(METHYL METHACRYLATE) FILMS IN MIXED-SOLVENTS [J].

COOPER, WJ ;

KRASICKY, PD ;

RODRIGUEZ, F .

JOURNAL OF APPLIED POLYMER SCIENCE, 1986, 31 (01) :65-73

[7] THE LIFE TIME OF A DISSOLVING POLYMERIC PARTICLE [J].

DEVOTTA, I ;

AMBESKAR, VD ;

MANDHARE, AB ;

MASHELKAR, RA .

CHEMICAL ENGINEERING SCIENCE, 1994, 49 (05) :645-654

[8]

Ekmekyapar A, 2003, CHEM BIOCHEM ENG Q, V17, P261

[9] CATALYTIC RING-CLOSING METATHESIS OF FUNCTIONALIZED DIENES BY A RUTHENIUM CARBENE COMPLEX [J].

FU, GC ;

NGUYEN, ST ;

GRUBBS, RH .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (21) :9856-9857

[10] NEW CHARACTERISTIC SIGNATURES FROM TIME-DEPENDENT STATIC LIGHT-SCATTERING DURING POLYMER DEPOLYMERIZATION, WITH APPLICATION TO PROTEOGLYCAN SUBUNIT DEGRADATION [J].

GHOSH, S ;

REED, WF .

BIOPOLYMERS, 1995, 35 (05) :435-450

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