𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Synthesis and characterization of poly[(2,6-dimethyl-1,4-phenylene oxide)-block-isoprene] diblock copolymers

✍ Scribed by Emmanuelle Servens; Dennis Löwik; Anton Bosman; Laurent Nelissen; Piet J. Lemstra

Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
821 KB
Volume
198
Category
Article
ISSN
1022-1352

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

As a first stage in the synthesis of a new class of thermoplastic elastomers, a suitable synthetic route for elastomeric tailor‐made diblock copolymers based on poly(2,6‐dimethyl‐1,4‐phenylene oxide), PPE, as the thermoplastic block and on 1,4‐polyisoprene, PIP, as the elastomeric block, is outlined. The 2,6‐dimethyl‐1,4‐phenylene oxide‐block‐isoprene diblock copolymers were synthesized via an amidation coupling route between the ammonium salt of PPE and the monocarboxylic acid of PIP in the presence of dicyclohexylcarbodiimide, DCC. Preliminary studies were focused on the synthesis of a welldefined low molar mass diblock copolymer (M~n~ = 10000) in order to facilitate the quantitative characterization by proton NMR spectroscopy. The developed amidation coupling route was successively applied to the synthesis of a similar diblock copolymer with a number‐average molar mass of 40000 in order to obtain optimum overall properties.

📜 SIMILAR VOLUMES

Synthesis and characterization of aminat
Synthesis and characterization of aminated poly(2,6-dimethyl-1,4-phenylene oxide)
✍ Yan Pan; Yuhui Huang; Bing Liao; Guangmin Cong 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 323 KB 👁 1 views

In this article, the chemical modification of poly(2,6-dimethyl-l,4-phenylene oxide) (PPO) was carried out by incorporating a n amine group into the PPO backbone. A maximum monosubstitution degree of 65 mol % was reached. The effects of reaction conditions on the functional group content in PPO is d

The preparation of microporous membranes
The preparation of microporous membranes from blends of poly(2,6-dimethyl-1,4-phenylene oxide) and sulfonated poly(2,6-dimethyl-1,4-phenylene oxide)
✍ Jan Schauer; Wolfgang Albrecht; Thomas Weigel 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 301 KB 👁 1 views

Poly(2,6-dimethyl-1,4 -phenylene oxide) (PPO) is a chemically resistant polymer and, therefore, an attractive material for the formation of membranes. However, membranes of unmodified PPO prepared by an immersion precipitation possess very low hydraulic permeabilities at the filtration processes. T

Synthesis and characterization of a poly
Synthesis and characterization of a poly(ether–ester) copolymer from poly(2,6 dimethyl-1,4-phenylene oxide) and poly(ethylene terephthalate)
✍ B. García-Gaitán; M. del P. Pérez-González; M. C. Zárate-Acevedo; A. Martínez-Ri 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 120 KB 👁 2 views

## Abstract A series of poly(ether–ester) copolymers were synthesized from poly(2,6 dimethyl‐1,4‐phenylene oxide) (PPO) and poly(ethylene terephthalate) (PET). The synthesis was carried out by two‐step solution polymerization process. PET oligomers were synthesized via glycolysis and subsequently u

Thermotropic liquid-crystalline aromatic
Thermotropic liquid-crystalline aromatic polyester-graft-poly(2,6-dimethyl-1,4-phenylene oxide) copolymers
✍ Moriyuki Sato; Takashi Mangyo; Ken-ichi Mukaida 📂 Article 📅 1995 🏛 John Wiley and Sons 🌐 English ⚖ 561 KB

Dicarboxy-terminated poly(2,6-dimethyl-l ,Cphenylene oxide) (PPO) macromonomers were prepared and subjected to the preparation of tailor-made aromatic thermotropic liquid-crystalline (LC) polyester-graft-PPO copolymers. The macromonomers were obtained by hydrolysis of dimethyl carboxylate-terminated

High-resolution thermogravimetry of poly
High-resolution thermogravimetry of poly(2,6-dimethyl-1,4-phenylene oxide)
✍ Xin-Gui Li 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 192 KB 👁 2 views

The thermal degradation and kinetics of poly(2,6-dimethylphenylene oxide) (PPO) were studied by high-resolution thermogravimetry. The thermogravimetry measurements were conducted at an initial heating rate of 50°C min Ϫ1 , resolution 4.0, and sensitivity 1.0 in both nitrogen and air from room temper