The combination of functional polymers with inorganic nanostructured compounds has become a major area of research and technological development owing to the remarkable properties and multifunctionalities deriving from their nano and hybrid structures [...]

POSS-Based Polymers

This review focuses on the processes involved in producing heat-resistant matrices for fiber reinforced plastics (FRP) by polymerization of the resins consisting of phthalonitrile monomers and comonomers, and the specifics of fiber reinforced plastics fabrication technologies. Polymerization behaviors observed in the presence of various types of initiators and in different temperature modes are reviewed. Fabrication methods and mechanical properties of FRPs based on phthalonitrile resins with various reinforcing materials are discussed. Properties of glass fiber reinforced plastics (GFRP) and carbon fiber reinforced plastics (CFRP) obtained through curing of different phthalonitriles are compared.

Bisphthalonitrile-based Thermosets as Heat-resistant Matrices for Fiber Reinforced Plastics

Effects of novel functionalized magnesium phosphate monomers on the flame retardancy and mechanical properties of polyethylene terephthalate copolymers

Review of quantitative and qualitative methods for monitoring photopolymerization reactions

During last decades a plethora of high temperature materials have been developed to work as a Thermal Protection System (TPS). Carbon based materials such as graphite, which possesses low density, high heat capacity and high energy of vaporization, have been used as TPS material. However, graphite has relatively poor mechanical properties, but exhibits low resistance to the thermal shocks. Accordingly, to bypass the limitation of graphite, carbon fibers are typically introduced in a carbon matrix to produce Carbon/Carbon Composites (CCCs). Among the different families of TPS solutions, Polymeric Ablative Materials (PAMs), produced combining high char yield matrices - mainly phenolic resins - and Carbon Fibers (CFs) are used to manufacture Carbon/Phenolic Composites (CPCs) i.e. the most important class of fiber reinforced PAM. Carbon fibers are traditionally produced from Polyacrylonitrile (PAN), Rayon and Pitch. Some limited researches also aimed to use cyanate-esters, bismaleimides, benzoxazines matrices in combination with ex-PAN-CFs, ex-Rayon-CFs, and ex-Pitch-CFs. In our paper, after covering the science and technology of these state-of-the-art fiber reinforced TPS materials, a review of current challenges behind the manufacturing of new, high char yield matrices and carbon fibers derived from alternative precursors will be provided to the reader. In particular, the possibility to produce CFs from precursors different from PAN, Rayon and Pitch will be reported and similarly, the technology of non-oil based phenolics, bismaleimides, cyanate-esters and benzoxazines will be discussed. The effect of the use of nanosized fillers on these matrices will also be reported. More in detail, after a preliminary section in which the state of the art of technologies behind carbon/phenolic composites will be covered, a second part of this review paper will be focused on the most recent development related to non-oil based phenolics and biomass derived carbon fibers. Finally, an outlook focused on the maturity of the lab-scale protocols behind the researches at the base of these non-traditional raw materials from an industrial point of view will conclude this review paper.

High Temperature Composites From Renewable Resources: A Perspective on Current Technological Challenges for the Manufacturing of Non-Oil Based High Char Yield Matrices and Carbon Fibers

Blends of cyanate ester and phthalonitrile–polyhedral oligomeric silsesquioxane copolymers were prepared, and their cure behavior and properties were compared via differential scanning calorimetry (DSC) analysis, thermogravimetric (TG) analysis, dynamic mechanical analysis, Fourier-transform far-infrared (FTIR) spectroscopy, and rheometric studies. The copolymer blends showed high chemical reactivity, low viscosity, and good thermal stability (TG temperatures were above 400 °C). The glass-transition temperature of the blends increased by at least 140 °C compared to cyanate ester resin. The blends are suitable for preparing carbon-fiber-reinforced composite materials via a winding process and a prepreg lay-up process with a molding technique. The FTIR data showed that the polymerization products contained triazine-ring structures that were responsible for the superior thermal properties.

https://www.mdpi.com/2073-4360/11/1/54/pdf

Blends of Cyanate Ester and Phthalonitrile⁻Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties.

Curing behaviors and thermomechanical properties of novolac cyanate–polyhedral oligomeric silsesquioxane copolymers

The invention provides a water-soluble mold material for a resin-based composite material, relates to a manufacturing method for the water-soluble mold material for the resin-based composite material,and belongs to the field of new materials. The water-soluble mold material is composed of water-soluble ceramic precursor water solution and filler for a water-soluble mold, wherein the mass percentage concentration of the water-soluble ceramic precursor water solution is 10 %-30 %, and the solute mass of the ceramic precursor water solution is 1 %-15 % of the mass of the filler for the water-soluble mold. According to the water-soluble mold material, the adopted water-soluble ceramic precursor is a substance with good thermal stability, can still be dissolved after being heated to 800 DEG C,has good high temperature resistance, and is suitable for forming the resin-based composite material with high curing temperature.

Water-soluble mold material for resin-based composite material

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Blends of Cyanate Ester and Phthalonitrile⁻Polyhedral Oligomeric Silsesquioxane Copolymers: Cure Behavior and Properties.

Curing behaviors and thermomechanical properties of novolac cyanate–polyhedral oligomeric silsesquioxane copolymers

Water-soluble mold material for resin-based composite material