Poly(benzyl methacrylate)

Catalog NumberHG-BULK25085830

CAS Number25085-83-0

CategoryPolymers

Molecular Weight

Mw ~15 - 650kDa

Appearance

White powder / microsphere

Application

High-End Composite Materials: Blended with epoxy resins to form layered or sea-island structures, enhancing mechanical strength for aerospace components or anticorrosion coatings.; Nanotechnology: Self-assembled nanofilms with controllable thickness via RAFT polymerization, suitable for high-precision separation membranes or electronic packaging.; Magnetic Materials: Combined with Fe₃O₄ nanoparticles to develop flexible magnetic films, applicable in electromagnetic shielding or sensors.

Storage

Keep in a cool, dark, and dry place

Specification

96% min

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Case Study

Poly(benzyl methacrylate) as a Model LCST Polymer for Dilute Solution Characterization in Ionic Liquids

Kharel, A., et al. (2020). Macromolecules, 53, 682-693.

Poly(benzyl methacrylate) (PBzMA) serves as a model polymer for investigating lower critical solution temperature (LCST) phase behavior and dilute solution thermodynamics in ionic liquids (ILs). The aromatic benzyl side chains engage in cation-pi interactions with imidazolium-based IL cations, driving negative entropy of mixing and enabling thermoreversible phase separation critical for ion gel and smart material applications.
Experimental Protocol: PBzMA samples of varying molecular weights (M_w = 2 x 10⁴ to 1.6 x 10⁵ g/mol) were synthesized via ATRP and dissolved at dilute concentrations in four TFSI-based ILs: [EMIM][TFSI], [BMIM][TFSI], [HMIM][TFSI], and [BMP][TFSI]. Cloud point temperatures were measured by turbidimetry at a 1 C/min heating rate. Static and dynamic light scattering were performed over 27-155 C to evaluate thermodynamic and diffusion parameters.
Performance Evaluation: All four IL systems exhibit LCST behavior, with cloud point temperatures tunable by cation identity: 106 C ([EMIM]), 157 C ([BMIM]), 226 C ([HMIM]), and 172 C ([BMP]) for PBzMA-160. The critical composition shifts toward the polymer-rich region, contrary to classical Flory-Huggins predictions. Remarkably, the second virial coefficient (A₂) remains positive even at temperatures within ~5 C of phase separation, where A₂ < 0 is typically expected. A₂ also exhibits a stronger molecular weight dependence (A₂ ~ M_w^{-0.3 to -0.5}) than the commonly observed exponent of ~-0.2 for polymers in good solvents. Flory exponents (nu ~ 0.53-0.54) derived from hydrodynamic radii confirm moderately good solvent conditions persist even near the LCST boundary.

Poly(benzyl methacrylate) as a Phase-Separating Modifier for Epoxy Thermoset Blends

Prolongo, M. G., et al. (2010). Polymer Engineering and Science, 50, 1820-1830.

Poly(benzyl methacrylate) (PBzMA) serves as a thermoplastic modifier in epoxy thermoset blends to tailor morphology and dynamic-mechanical properties. Upon curing with 4,4'-diaminodiphenylmethane (DDM), PBzMA undergoes reaction-induced phase separation, generating distinct morphologies that influence toughness and viscoelastic behavior of the resulting biphasic materials.
Experimental Protocol: PBzMA/epoxy blends at 5-25 wt% were prepared by dissolving PBzMA (M_w ~ 7 x 10⁴ g/mol) in DGEBA resin at 120 C, then adding stoichiometric DDM at 80 C. Samples were cured at 120 C for 2 h, with postcuring at 150 C or 180 C to achieve full conversion. Morphology was examined by SEM, while DMTA was performed in dual cantilever bending mode from 25 to 250 C at 1-50 Hz.
Performance Evaluation: At 5 wt% PBzMA, the blend exhibits nodular morphology with ~0.7 micron PBzMA spheres dispersed in the epoxy matrix. Between 10-15 wt%, combined morphologies appear featuring regions of both dispersed spheres and phase inversion. Full phase inversion occurs at 20 wt%, where epoxy spheres (average diameters ~30 micron and ~2 micron) are surrounded by a continuous PBzMA-rich phase. DMTA reveals two glass transition temperatures corresponding to the PBzMA-rich (68-90 C) and epoxy-rich (167-177 C) phases. The storage modulus at 105 C matches the rule of mixtures for nodular morphology, follows the Davies cocontinuous model for combined morphologies, and drops significantly below all model predictions for inverted morphology.

• Molecular Weight: Mw ~15 - 650kDa
• Appearance: White powder / microsphere
• Application: High-End Composite Materials: Blended with epoxy resins to form layered or sea-island structures, enhancing mechanical strength for aerospace components or anticorrosion coatings.; Nanotechnology: Self-assembled nanofilms with controllable thickness via RAFT polymerization, suitable for high-precision separation membranes or electronic packaging.; Magnetic Materials: Combined with Fe₃O₄ nanoparticles to develop flexible magnetic films, applicable in electromagnetic shielding or sensors.
• Storage: Keep in a cool, dark, and dry place
• Specification: 96% min