Rod aggregation in graft rigid-rod copolymers for single-component molecular composites

Song, Hyun Hoon; Price, Gary E.; Dotrong, M.; Vakil, U. M.; Santhosh, U.; Evers, Robert C.

doi:10.1016/0032-3861(94)90861-3

Cited by 17 publications

(10 citation statements)

References 11 publications

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“…Other composite systems such as PBZT/poly(ether ether ketone) (PEEK)275,277,284 and PBZT/polyimide285 have been explored. To increase the interaction between two components in composites, an ionic molecular composite286 and a graft copolymer287–291 of PBZT with poly(ether ketone) were prepared, respectively. WAXD studies291 on the graft copolymer indicated that the system was stable against thermally induced separation.…”

Section: Molecular Compositesmentioning

confidence: 99%

Rigid‐Rod Polymers: Synthesis, Processing, Simulation, Structure, and Properties

Hu¹,

Jenkins

Min

et al. 2003

Macro Materials & Eng

174

105

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Synthesis, structure, and properties of rigid‐rod polymers with special emphasis on poly(p‐phenylene benzobisoxazole) (PBO) and poly(p‐phenylene benzobisthiazole) (PBZT) have been reviewed. Recent studies on chemical modifications and molecular simulations have also been given. After nearly 20 years of research and development, PBO fiber was commercialized in the late 1990s. However, due to processing difficulties, the concept of the so called molecular composites has not been successful. Development of the high compressive strength M5 and dihydroxy‐PBI fibers clearly suggest that there is potential for further developing properties of this class of materials. Opto‐electronic properties have also been reviewed.Synthesis of PBZT.magnified imageSynthesis of PBZT.

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Section: Molecular Compositesmentioning

confidence: 99%

Rigid‐Rod Polymers: Synthesis, Processing, Simulation, Structure, and Properties

Hu¹,

Jenkins

Min

et al. 2003

Macro Materials & Eng

174

105

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“…The flexural modulus for the bulk specimen with the phase structure of finely dispersed PBZT particles with 34.7 wt% amount of PBZT was nearly 7.4 GPa the value for a graft copolymer reported by Dotrong et a/. consisting of a PEK side chain attached to PBZT, 13 with 36wt% of PBZT. Table III indicates that the 3-D network structure leads to an outstandingly high efficiency of reinforcing materials, which in turn yields a higher flexural modulus than that of other specimens.…”

Section: Relationship Between Shape Of Dispersed Pbzt and Mechanical mentioning

confidence: 69%

“…11 -13 Dotrong et al synthesized a graft copolymer consisting of poly(ether ketone) (PEK) side chains attached to PBZT and called it "Single-Component Molecular Composite". 13 We attempted to produce two single-component nano composite materials and report the relationship between the mechanical properties and phase structure. …”

mentioning

confidence: 99%

Studies on Molecular Composite IV. Block Copolymer as a Single-Component Nano Composite Consisting of Poly(p-phenylene benzobisthiazole) and Thermoplastic Aromatic Polyamide

Akita

Kobayashi

1999

Polym J

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“…The ABA copolymers made with carboxy-terminated PBZT and 3,4-diaminobenzoic acids demonstrate much better tensile strength (up to 33%) than the blends (436,437). The graft copolymers of PEK and PBZT improve processability of the composites (438) and exhibit advantages in preventing the segregation of PBZT molecules (439,440). The toughness of composites increases with the increase in the rigid-rod polymer content (441).…”

Section: Molecular Composites and Nanocompositesmentioning

confidence: 99%

Rigid‐Rod Polymers

Wang¹,

Jiang²,

Adams³

2011

Encyclopedia of Polymer Science and Technology

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Pursuing high strength and high modulus polymer fibers and novel electrooptical properties have motivated much research activity in rigid‐rod polymers in the past 40 years. In this review, we examine the synthesis, structures, and properties of rigid‐rod polymers with emphasis on polybenzobisoxazoles (PBO), polybenzobisthiazoles (PBZT) and polybenzimidazoles (PBI), beginning with their solution properties, especially lyotropic liquid crystallinity. High performance fibers spun from lyotropic liquid crystalline polyphosphoric acid (PPA) solution are described. The characterization of fiber properties including mechanical, thermal, electrical, and optical properties is summarized. PBO (Zylon) and PIPD (M5) fibers were successfully commercialized in high strength applications such as body armor, ropes, cables, and recreational equipment in the last 10 years, and we discuss the possible causes of rapid degradation of some PBO fibers. The concepts of molecular composites and nanocomposites provide new applications in antiballistic materials, fire protection, athletic equipment, cables, strings, ropes, cordage, sails, multilayer circuits, and catalyst supports. Recently, rigid‐rod polymer films have drawn attention in the electrooptical fields, especially for phosphoric acid (PA)‐doped PBI membranes (Celtec MEAs) in the applications of high temperature fuel cells. Computer simulation has been employed as a powerful tool to predict the properties of the rigid‐rod polymers.

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Rod aggregation in graft rigid-rod copolymers for single-component molecular composites

Cited by 17 publications

References 11 publications

Rigid‐Rod Polymers: Synthesis, Processing, Simulation, Structure, and Properties

Rigid‐Rod Polymers: Synthesis, Processing, Simulation, Structure, and Properties

Studies on Molecular Composite IV. Block Copolymer as a Single-Component Nano Composite Consisting of Poly(p-phenylene benzobisthiazole) and Thermoplastic Aromatic Polyamide

Rigid‐Rod Polymers

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