Synthesis and characterization of polyimidothioethers

Koelling, Arlene Saum; Surendran, G.; James, William Joseph

doi:10.1002/app.1992.070450414

Cited by 9 publications

(8 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, it can form various linear polymers3–5 through Michael‐addition reactions. BMI, for example, undergoes the above nucleophilic addition with thiols or hydrogen sulfide to prepare polyimidothioether6–8 or reacts with diamine to synthesize polyaspartimide 9–11…”

Section: Introductionmentioning

confidence: 99%

Studies of fluorine‐containing bismaleimide resins part I: Synthesis and characteristics of model compounds

Wang

Shu

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

A series of fluorine-containing bismaleimide (FBMI) monomers are synthesized by a 3-step reaction for using as the applications of low-k materials. The synthesized FBMI monomers are characterized by the 1 H, 13 C, 19 F nuclear magnetic resonance (NMR) spectroscopy and element analysis. These FBMI monomers react with free radical initiator or self-cure to prepare FBMI-polymers. All the self-curing FBMI resins have the glass transition temperatures (T g ) in the range of 128-141 C and show the 5% weight loss temperatures (T 5% ) of 235-293 C in nitrogen atmosphere. The higher heat resistance of selfcuring FBMI resin relative to FBMI-homopolymer is due to its higher crosslinking density. The FBMI resins exhibit improved dielectric properties as compared with commercial bismaleimide (BMI) resins with the dielectric constants (D k ) lower than 2.49, which is related to the low polarizability of the CAF bond and the large free volume of CF 3 groups in the polymers. Besides, the flame retardancy of all these FBMI resins could be enhanced via the introduction of Br-atom.

show abstract

Section: Introductionmentioning

confidence: 99%

Studies of fluorine‐containing bismaleimide resins part I: Synthesis and characteristics of model compounds

Wang

Shu

2011

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…As an alternative to chemical cross-linking, thermal and mechanical properties of thiol–ene-based materials can be enhanced by employing either stiff reactant backbones ,,− or rigid cyclic-ene monomers such as norbornene ,− and maleimide. ,,,, For example, the thiol–maleimide reaction ,,,,,, has been used to synthesize relatively high- T g (∼130 °C) thermosetting resins which are promising materials for load-bearing applications . Moreover, the inclusion of inorganic fillers ,− such as silica particles and glass fibers has also been employed to increase the strength and T g of thiol–ene-based materials.…”

Section: Introductionmentioning

confidence: 99%

Segmented Thermoplastic Polymers Synthesized by Thiol–Ene Click Chemistry: Examples of Thiol–Norbornene and Thiol–Maleimide Click Reactions

Jin¹,

Leitsch²,

Chen³

et al. 2018

Macromolecules

View full text Add to dashboard Cite

Thiol–ene click reactions are used to synthesize segmented thermoplastic materials for the first time via a soft segment + hard segment + chain extender approach that is commonly used to synthesize thermoplastic polyurethane elastomer (TPU). We employ a relatively long chain difunctional thiol (2500 g/mol) as soft segment, a small-molecule thiol as chain extender, and rigid cyclic-ene monomers, including norbornene (containing either urethane or urea linkages in the backbone) and maleimide, as hard segments to achieve thiol–norbornene and thiol–maleimide thermoplastics. The majority of the thiol–norbornene polymers synthesized with 45% or 55% urethane-based norbornene hard segments exhibit phase separation with broad interfaces as indicated by dynamic mechanical analysis (DMA) and hold promise as both thermoplastic elastomers competitive with TPUs and broad-temperature-range damping materials. Thiol–norbornene polymers synthesized with 50% urea-based norbornene hard segments are nanophase separated with sharp interfaces (as indicated by DMA and small-angle X-ray scattering) due to the stronger interurea hydrogen bonding as compared with interurethane interactions. The low strain at break (∼30%) and high Young’s modulus (200–300 MPa) suggest that the 50% hard segment forms the matrix in these polymers, disallowing elastomeric response. Segmented thiol–maleimide thermoplastics, synthesized without isocyanates at 45% and 50% hard-segment content, exhibit highly effective nanophase separation and properties indicating potential to be competitive with some thermoplastic non-isocyanate polyurethane (NIPU) elastomers and TPUs.

show abstract

“…BMI was addition‐type polyimide which can be cured without the evolution of volatiles by‐products and it shown good fatigue resistance, excellent thermal and mechanical properties . Resin formulations on the basis of bismaleimide had been used for advanced composites, for electronics, for aerospace materials, for filament winding operations, and so on .…”

Section: Introductionmentioning

confidence: 99%

Copolymerizing behavior and processability of allyl-functional bisphthalonitrile/bismaleimide system

Zou

Jia

et al. 2015

Polym. Compos.

View full text Add to dashboard Cite

A prepolymer constituted with bisphthalonitrile containing allyl groups (DBPA-Ph) and 4, 4 0 -bis-(maleimidodiphenyl)methane (BMI) was prepared. The reaction between DBPA-Ph and BMI was characterized with FTIR. The copolymerization behavior and processability of DBPA-Ph/BMI prepolymer was studied by differential scanning calorimetry (DSC) and dynamic rheological analysis. The results of DSC indicated that the DBPA-Ph/BMI system presented two-stage thermal polymerization attributing to the ene reaction between allyl moieties and maleimide at low temperature (around 2638C) and the ring-form polymerization of cyano moieties at high temperature (around 3328C), respectively. The results of dynamic rheological analysis indicated, with the introduction of BMI, the curing properties of DBPA-Ph/BMI system improved. The DBPA-Ph/BMI copolymers were prepared with relatively shorter curing time and shown high glass transition temperature (>3508C). The DBPA-Ph/BMI/glass fiber composite laminates were prepared and exhibited relatively better mechanical properties (>440 MPa) and satisfactory thermal properties (>4408C). The outstanding glass transition temperature, better processability, desirable thermal and thermo-oxidative stabilities demonstrated the introduction of BMI would contribute to the application of DBPA-Ph. POLYM. COMPOS., 38:1591-1599

show abstract

Synthesis and characterization of polyimidothioethers

Cited by 9 publications

References 14 publications

Studies of fluorine‐containing bismaleimide resins part I: Synthesis and characteristics of model compounds

Studies of fluorine‐containing bismaleimide resins part I: Synthesis and characteristics of model compounds

Segmented Thermoplastic Polymers Synthesized by Thiol–Ene Click Chemistry: Examples of Thiol–Norbornene and Thiol–Maleimide Click Reactions

Copolymerizing behavior and processability of allyl-functional bisphthalonitrile/bismaleimide system

Contact Info

Product

Resources

About