Molecular composites of poly(p-phenylene terephthalamide) anion and poly(ethylene oxide): Mechanical properties

Tsou, L.; Sauer, J. A.; Hara, M.

doi:10.1002/(sici)1099-0488(20000515)38:10<1377::aid-polb150>3.0.co;2-7

Cited by 19 publications

(4 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the PVP system, we have shown that the deformation mode of the matrix polymer (PVP) changes favorably (from crazing to shear yielding) due to ionedipole interactions between the component polymers [15]. Also, we have indicated the favorable interactions between the component polymers in the amorphous phase of the matrix polymer due to ionedipole bonds for ionic PPTA/PEO blends [16]. We believe that such a reinforcing mechanism is also involved in the current system, as already described.…”

Section: Comparison With the Results On Molecular Composites Containisupporting

confidence: 74%

Novel blends made of ionic naphthalene thermotropic polymer and poly(ethylene terephthalate)

Xue

Hara

2006

Polymer

Self Cite

View full text Add to dashboard Cite

Section: Comparison With the Results On Molecular Composites Containisupporting

confidence: 74%

Novel blends made of ionic naphthalene thermotropic polymer and poly(ethylene terephthalate)

Xue

Hara

2006

Polymer

Self Cite

View full text Add to dashboard Cite

“…Poly( p ‐phenylene benzobisoxazole) (PBO) has received great interest because of its high performance such as excellent mechanical properties, good thermal stability, and environmental stability 1–3. Typically, PBO fibers have been used in high‐strength applications, such as in body armor and ropes.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of degradation of poly(p‐phenylene benzobisoxazole) under hydrolytic conditions

Zhang

Liu

et al. 2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(p-phenylene benzobisoxazole) (PBO) fiber has received great interest because of its excellent mechanical properties and good thermal stability. The objective of this study was to expose degradation mechanism of PBO under neutral and acidic conditions by molecular mass and Fourier transform infrared (FTIR) spectroscopy. Results were not consistent with the classic degradation mechanism, which indicates that degradation should occur through the ring opening and chain scission of the benzoxazole ring. The FTIR absorption spectra of PBO suggested that the o-hydroxy amide linkage (the open ring structure) was present in the PBO molecule chain to some extent because of the incomplete polymerization. Further investigation showed that hydrolysis might occur in the open ring section during hydrolytic degradation. Based on the experimental data, a new degradation mechanism was proposed. It suggests that, in the early and middle stages, hydrolysis occurred primarily in the o-hydroxy amide linkage of the open ring. The concentration of the o-hydroxy amide structure determined the speed of degradation of PBO.

show abstract

“…Besides it excellent mechanical properties, it also shows very good thermal stability and environmental stability. This material has received more and more interest in the reinforced materials and aircrafts [1,2]. The chemical structure of the PBO molecule is shown in scheme 1.…”

Section: Introductionmentioning

confidence: 99%

Effect of Heat Treatment on Properties and Structural Changes of Poly(p-Phenylene Benzobisoxazole) Fiber

Ying

Liu

et al. 2011

AMR

View full text Add to dashboard Cite

The changes of structure and mechanical properties of poly(p-phenylene benzobisoxazole) (PBO) fibers with different heat-treatment condition involving temperature, level of tension and duration was investigated. The results revealed that the modulus of fibers was affected greatly by the heat treatment, while the strength of fiber was insensitive to the applied parameter during the heat treatment. It was also found that the heat treatment could promote the ring-close reaction of PBO molecules to completion and impelled the molecular chains to adjust and slide along the stress direction for further orientation, which could make the molecular chain more stretched, regularize the structure of PBO fibers and improve the mechanical properties of PBO fiber.

show abstract

Molecular composites of poly(p-phenylene terephthalamide) anion and poly(ethylene oxide): Mechanical properties

Cited by 19 publications

References 22 publications

Novel blends made of ionic naphthalene thermotropic polymer and poly(ethylene terephthalate)

Novel blends made of ionic naphthalene thermotropic polymer and poly(ethylene terephthalate)

Mechanism of degradation of poly(p‐phenylene benzobisoxazole) under hydrolytic conditions

Effect of Heat Treatment on Properties and Structural Changes of Poly(p-Phenylene Benzobisoxazole) Fiber

Contact Info

Product

Resources

About