A new soluble aramide with pendant phthalonitrile units and polymer property enhancement by nitrile cure reactions

Zeng, Ke; Hong, Haibing; Zhou, Shaohong; Wu, Dimeng; Miao, Peikai; Zhifu, Huang; Yang, Gang

doi:10.1016/j.polymer.2009.08.033

Cited by 50 publications

(34 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shifts were observed for cured CN-PI 4 and 5. In our previous study, triazine formation was confirmed in CN-PA system [19]. Therefore, triazine formation was probably responsible for the crosslinking of the cured CN-PI 4 and 5.…”

Section: Thermal Polymerization Behaviormentioning

confidence: 73%

“…The solubility of the CN-PA was improved, while its solvent-resistance and thermal properties can be controlled via the thermal polymerization of the pendant phthalonitrile group [19]. In this article, the phthalonitrile units were introduced into PI system as pendant substituents with an aim to balance the contradiction between the processability and properties of the PIs through phthalonitrile thermal polymerization.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and thermal polymerization of new polyimides with pendant phthalonitrile units

Zeng

Xiang

et al. 2011

Polym. Bull.

Self Cite

View full text Add to dashboard Cite

New polyimides with pendant phthalonitrile units were synthesized via the conventional two-step polymerization approach. The chemical structure of the PIs was confirmed by IR and 1 H NMR spectra. The thermogravimetric analysis and differential scanning calorimetry revealed that the thermal properties of the new PIs along with their solvent-resistance can be promoted after thermal treatment at 300°C. This promotion can be attributed to the nitrile cure reaction of the phthalonitrile units indicated by the decrease in nitrile absorptions at around 2231 cm -1 of the IR spectra.

show abstract

Section: Thermal Polymerization Behaviormentioning

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Synthesis and thermal polymerization of new polyimides with pendant phthalonitrile units

Zeng

Xiang

et al. 2011

Polym. Bull.

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is well known that a simple and effective method is the incorporation of hydroxyl or amino groups into the reactive phthalonitrile units. The hydroxyor amino-functional phthalonitrile polymers were proved to cross-link by self-promoted curing [12,13]. A kind of phthalonitrile containing benzoxazine resin (BA-ph) was designed and synthesized via a condensation reaction between amino-functional phthalonitrile and bisphenol A, shown in Figure 1 [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of bisphenol-A on the structures and properties of phthalonitrile-based resin containing benzoxazine

Xu¹,

Jia²,

Liu³

2015

Express Polym. Lett.

View full text Add to dashboard Cite

Abstract. Phthalonitrile and benzoxazine have been considered as high-performance materials in the field of heterocyclic chemistry. The polymerization of phthalonitrile and benzoxazine accelerated by active phenolic hydroxyl has attracted wide interests. In this work, self-promoted polymerization behavior and processability of phthalonitrile containing benzoxazine (BA-ph) with bisphenol-A (BPA) were investigated. Results revealed that BA-ph/BPA exhibited representative doublestage curing behaviors corresponding to the ring-opening polymerization of benzoxazine rings and ring-formation polymerization of nitrile groups. Compared with that of BA-ph, processability of BA-ph/BPA was improved and could be tuned by varying BPA contents, processing temperature and time. Then BA-ph/BPA/glass fiber (GF) composite laminates were prepared. In comparison with that of BA-ph/GF laminates (542 MPa and 25.8 GPa), the flexural strength and modulus were up to 789 MPa and 23.6 GPa, respectively. Moreover, double T g s were observed at temperature around 200~300°C and 300~380°C, indicating microphase separation during the polymerization of oxazine rings and nitrile groups, confirmed by the scanning electron microscopic (SEM) images. Thermal stabilities demonstrated that all BA-ph/BPA/GF composites exhibited high T 10% up to 510°C. The systematic study of BA-ph/BPA system could enrich our knowledge on phthalonitrile-based resins in industrial applications, especially in the areas which require excellent mechanical properties and high temperature resistance.

show abstract

“…Phthalonitrile-based monomers and oligomers containing a variety of linkages such as aromatic ether [10,20], sulfone [21], oligomeric aromatic ethercontaining units [11,12,14], oligomeric biphenyl ethernitrile units [22][23][24] and benzoxazine units [25,26] have been designed and synthesized. Then, greatly improved properties of these monomers and oligomers can be achieved by including a low complex melt viscosity and a broad processing window.…”

Section: Introductionmentioning

confidence: 99%

“…It is well-known that a simple and effective method is incorporating amino or hydroxyl groups into the reactive phthalonitrile units. Then, lots of amino-functional or hydroxy-functional phthalonitrile polymers have been proved to be cross-linked by selfcatalyzed curing reaction without the addition of any other curing additives [23].…”

Section: Introductionmentioning

confidence: 99%

Self-promoted curing phthalonitrile with high glass transition temperature for advanced composites

et al. 2012

View full text Add to dashboard Cite

A novel self-promoted curing phthalonitrile monomer was synthesized via substitution reaction of 4-nitrophthalonitrile and 3-aminophenol at the presence of K 2 CO 3 in the dimethylsulfoxide solvent. The phthalonitrile was characterized by Fourier transform infrared spectra, nuclear magnetic resonance, gel permeation chromatography, differential scanning calorimetry, dynamic rheological analysis and thermal gravimetric analysis. The phthalonitrile monomer can be thermally polymerized with self-promoted curing behaviors. The prepolymerization reaction of the phthalonitrile prepolymer was investigated and the phthalonitrile prepolymer exhibited the desirable processing feature. With the curing process of low curing temperature and short curing time, the cured polymers exhibited high glass transition temperatures (241-270°C) and excellent thermal stabilities with the 5 % weight loss temperature (395-441°C). The novel phthalonitrile can be a good candidate as matrix for high performance polymeric materials.

show abstract

A new soluble aramide with pendant phthalonitrile units and polymer property enhancement by nitrile cure reactions

Cited by 50 publications

References 27 publications

Synthesis and thermal polymerization of new polyimides with pendant phthalonitrile units

Synthesis and thermal polymerization of new polyimides with pendant phthalonitrile units

Effect of bisphenol-A on the structures and properties of phthalonitrile-based resin containing benzoxazine

Self-promoted curing phthalonitrile with high glass transition temperature for advanced composites

Contact Info

Product

Resources

About