Description

Poly(Phenyl-Propylsilesquioxane) is a high-performance hybrid inorganic-organic polymer belonging to the silsesquioxane family, known for its exceptional thermal stability and versatile material properties. This compound is valued for its ability to enhance the thermal, mechanical, and dielectric characteristics of advanced composite materials and coatings. It is a critical raw material for R&D and production in industries such as aerospace, electronics, and specialty polymers, where performance under extreme conditions is paramount.

Application

• As a high-temperature resin modifier and cross-linking agent for epoxy, silicone, and polyimide systems.
• Key component in the formulation of advanced protective coatings with superior heat, oxidation, and corrosion resistance.
• Used as a precursor for ceramic materials (POSS ceramics) via pyrolysis in aerospace and semiconductor applications.
• Enhances the dielectric properties and reduces the dielectric constant in microelectronic encapsulants and interlayer dielectrics.
• Serves as an additive for specialty adhesives and sealants to improve thermal stability and mechanical strength.
• Employed in the development of flame-retardant polymer composites for automotive and construction materials.
• Utilized as a stationary phase modifier in high-performance liquid chromatography (HPLC) for specialized separations.
• Acts as a nanoscale reinforcing filler in polymer nanocomposites to improve modulus and thermal properties without sacrificing processability.

Basic Information

Product Name	Poly(Phenyl-Propylsilesquioxane)
CAS No.	68037-90-1
Molecular Formula	(C15H18O1.5Si)n
Molecular Weight	Varied (Polymeric)
Synonyms	Poly(phenylpropylsilsesquioxane); Phenylpropyl POSS; Polyhedral Oligomeric Silsesquioxane with Phenyl and Propyl substituents; Phenyl-Propyl Silsesquioxane Resin; Silsesquioxane, phenylpropyl-; Inorganic-Organic Hybrid Polymer; Phenylpropyl T8 Silsesquioxane (for specific cage structure); Octa(phenylpropyl) T8-POSS
EINECS	Contact for details

Quality Control

Our Poly(Phenyl-Propylsilesquioxane) is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including FT-IR, NMR, and GPC/SEC, to ensure consistent molecular structure, purity, and property profiles. Certificates of Analysis (COA) detailing batch-specific results are provided to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents. For long-term storage under inert atmosphere (e.g., nitrogen or argon) is recommended to prevent potential moisture absorption and maintain optimal quality.

Specification

Item	Specification
Appearance	White to off-white powder or solid
Identification (IR)	Conforms to structure
Assay (Si Content)	> 95%
Molecular Weight (Mw, GPC)	1000 - 5000 g/mol (Typical)
Polydispersity Index (PDI)	< 2.0
Loss on Drying	< 1.0 %
Residue on Ignition (Ash)	< 0.5 %
Transition Temperature (DSC)	Contact for details

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.