Description

Polystyrene-B-Poly(4-Vinyl Pyridine) is a well-defined amphiphilic block copolymer, synthesized via controlled polymerization techniques. This material matters for its unique ability to self-assemble into nanostructures in selective solvents, combining the hydrophobic nature of polystyrene with the pH-responsive, hydrophilic character of poly(4-vinyl pyridine). Industries requiring advanced functional materials, such as nanotechnology, pharmaceuticals, and specialty coatings, need this copolymer for developing smart delivery systems, responsive surfaces, and templating agents.

Application

• Nanoparticle & Micelle Formation: As a key component for creating stable, self-assembled nanostructures for drug encapsulation and delivery.
• pH-Responsive Drug Delivery Systems: Utilizing the poly(4-vinyl pyridine) block's ability to change solubility with pH for targeted release.
• Polymer Electrolyte Membranes: For fuel cell applications, where the pyridine groups can facilitate proton transport.
• Surface Modification & Coatings: To create smart, adhesive, or anti-corrosive surfaces that respond to environmental stimuli.
• Templating Agent for Mesoporous Materials: Serving as a structure-directing agent in the synthesis of ordered porous silica or carbon materials.
• Compatibilizer in Polymer Blends: Improving the interfacial adhesion between immiscible polymers due to its dual chemical nature.
• Heavy Metal Ion Adsorption: Leveraging the chelating ability of the pyridine units for wastewater treatment and metal recovery.
• Research & Development: As a model block copolymer for academic and industrial research in polymer science and soft matter physics.

Basic Information

Product Name	Polystyrene-B-Poly(4-Vinyl Pyridine)
CAS No.	26222-40-2
Molecular Formula	(C8H8)m-(C7H7N)n
Molecular Weight	Variable (Depends on block lengths m & n)
Synonyms	PS-b-P4VP; Polystyrene-block-poly(4-vinylpyridine); Poly(styrene-block-4-vinylpyridine); 4-Vinylpyridine-styrene block copolymer; Styrene/4-Vinylpyridine Block Copolymer; P(S-b-4VP); Amphiphilic PS-P4VP Diblock Copolymer; Block copolymer of styrene and 4-vinylpyridine
EINECS	Contact for details

Quality Control

Our block copolymers are synthesized under controlled conditions and undergo rigorous quality testing. Each batch is characterized to ensure precise control over molecular weight, polydispersity index (PDI), and block composition. Certificates of Analysis (COA) are provided, detailing key parameters such as molecular weight (by GPC), composition ratio (by 1H NMR), and thermal properties (by DSC). We adhere to stringent in-process controls to guarantee batch-to-batch consistency for your R&D and production needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry place at room temperature (15-25°C). This polymer is hygroscopic (moisture-sensitive); prolonged exposure to high humidity should be avoided to prevent property changes.

Specification

Item	Specification
Appearance	White to off-white solid
Identification (IR)	Conforms to structure
Molecular Weight (Mn, GPC)	As per customer grade (e.g., 10k-b-5k, 20k-b-10k)
Polydispersity Index (Đ, GPC)	≤ 1.20
Composition (PS wt%, 1H NMR)	As per target ± 3%
Glass Transition Temp (DSC)	Tg1 ~100°C (PS), Tg2 ~150°C (P4VP)
Residual Monomer (HPLC)	< 0.5%
Solubility	Soluble in THF, DMF, Chloroform

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