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POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE)

CAS No.
25134-01-4
Chemical Name:
POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE)
Synonyms
Poly(p-phenylene Oxide);2,6-dimethyl-phenohomopolymer;POLY(2,6-DIMETHYL-P-PHENYLENE OXIDE);Phenol,2,6-dimethyl-,homopolymer;POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE);POLY(2,6-DIMETHYLENE-P-PHENYLENE OXIDE);2,6-DIMETHYL-1,4-PHENYLENE OXIDE POLYMER;2,6-dimethyl-1,4-phenylene oxide homopolymer;Poly(2,6-diMethyl-1,4-phenylene oxide) powder;Poly(2,6-dimethyl-1,4-phenylene oxide) pellets
CBNumber:
CB7490491
Molecular Formula:
C8H10O
Molecular Weight:
122.1644
MDL Number:
MFCD00084368
MOL File:
25134-01-4.mol
MSDS File:
SDS
Last updated:2023-05-04 17:34:36

POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE) Properties

Melting point 258-261 °C
Density 1.06 g/mL at 25 °C(lit.)
form powder
Indirect Additives used in Food Contact Substances 2,6-DIMETHYLPHENOL HOMOPOLYMER
EPA Substance Registry System Phenol, 2,6-dimethyl-, homopolymer (25134-01-4)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS08
Signal word  Danger
Hazard statements  H360
WGK Germany  3

POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE) price More Price(3)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 181781 Poly(2,6-dimethyl-1,4-phenylene oxide) powder 25134-01-4 250g $149 2024-03-01 Buy
Sigma-Aldrich 181781 Poly(2,6-dimethyl-1,4-phenylene oxide) powder 25134-01-4 5g $45.8 2023-06-20 Buy
Sigma-Aldrich 181803 Poly(2,6-dimethyl-1,4-phenylene oxide) 98% 25134-01-4 25g $484 2024-03-01 Buy
Product number Packaging Price Buy
181781 250g $149 Buy
181781 5g $45.8 Buy
181803 25g $484 Buy

POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE) Chemical Properties,Uses,Production

Chemical Properties

Poly(2,6-dimethyl-l,4-phenylene oxide) is characterized by high tensile strength, stiffness, impact strength and creep resistance; it also has good dielectric properties. These properties are maintained over a broad temperature range (about -45-120°C). The polymer is self-extinguishing. The polymer has a high glass-transition temperature (Tg = 208°C) which restricts crystallization in normal moulding techniques. Crystalline material may be obtained by heating the amorphous material or from solutions. One notable feature of the polymer is its good dimensional stability; it has a very low coefficient of thermal expansion and low water absorption.
Poly(2,6-dimethyl-l,4-phenylene oxide) is soluble in aromatic hydrocarbons and chlorinated solvents and several aliphatic hydrocarbons cause environmental stress cracking. The polymer is outstandingly resistant to most aqueous reagents, being unaffected by acids, alkalis and detergents.

Chemical Properties

white to off-white powder

Uses

Imidazolium modified PPO with liquid ionic graphene oxide can be used as an anion exchange membrane (AEM) composite with a peak power density of 136 mW cm?2 for use in the fabrication of high performance fuel cells. It may also be sulfonated to form a long chained polymeric structure with an efficiency of 81.8% at a current density of 120 mA cm?2 for potentiall use in vanadium redox flow batteries (VRFBs) as effective energy storage systems. It may also be used in the formation of AEMs, which can be used in the development of microbial desalination cell system (MDCS).

Uses

At the present time, most poly(2,6-dimethyl-l,4-phenylene oxide) intended for commercial use is blended with polystyrene (principally in the form of high-impact polystyrene). The two materials are miscible over the complete composition range. The effect of blending is to facilitate melt-processing (by lowering melt viscosity) and to lower cost whilst the desirable properties of the straight polymer are largely retained. In one recent product, the polystyrene is grafted on to the polyether. Polystyrene-modified poly(2,6- dimethyl-l,4-phenylene oxide) (commonly referred to as PPO) has found a variety of uses, which include telecommunication and business equipment housings and components and automotive parts.

Definition

ChEBI: 2,6-Dimethylphenol is a hydroxytoluene.

Preparation

Oxidative coupling is readily accomplished by passing oxygen into a reaction mixture containing 2,6-xylenol, pyridine and cuprous chloride. (The molar ratio of pyridine to cuprous ion is generally in the range 10: 1 to 100: 1.) External heating is unnecessary; during the course of the reaction the temperature rises to about 70??C. The polymer is precipitated with dilute hydrochloric acid and collected by filtration.
It is generally accepted that aryloxy radicals are intermediates in the polymerization reaction since ESR studies have shown the presence of both monomeric and polymeric aryloxy radicals in polymerizing solutions of 2,6- xylenol. The simplest mechanism that can be suggested for the reaction is aromatic substitution:

25134-01-4 synthesis

General Description

Poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) is an anion exchange membrane (AEM) material that is mainly used as a cross-linker in which the methyl groups are used to bond with ultraviolet (UV) excited ketones.

POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE) Preparation Products And Raw materials

Raw materials

Preparation Products

POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE) Suppliers

Global( 41)Suppliers
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Hangzhou Verychem Science And Technology Co.Ltd
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Shandong Xiya Chemical Co., Ltd 4009903999 13355009207 3007715519@qq.com China 18736 57
BOC Sciences 1-631-485-4226; 16314854226 info@bocsci.com United States 14059 65
Phenol,2,6-dimethyl-,homopolymer POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE) POLY(2,6-DIMETHYLENE-P-PHENYLENE OXIDE) 2,6-DIMETHYL-1,4-PHENYLENE OXIDE POLYMER POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE), SECONDARY STANDARD Poly(2,6-dimethyl-1,4-phenylene oxide), approx. M.W. 50,000 2,6-dimethyl-1,4-phenylene oxide homopolymer Poly(2,6-diMethyl-1,4-phenylene oxide) powder Poly(2,6-dimethyl-1,4-phenylene oxide) analytical standard, Mw 30,000 (Typical), Mn 20,000 (Typical) Poly(2,6-dimethyl-1,4-phenylene oxide) pellets 2,6-dimethyl-phenohomopolymer POLY(2,6-DIMETHYL-P-PHENYLENE OXIDE) Poly(p-phenylene Oxide) 25134-01-4 C8H10Ox C6H2CH32On Poly(phenylene oxide) Thermoplastic Resins Engineering Polymers Polymer Science Polymers