✦ LIBER ✦

Crosslinkable polyesters containing styrylpyridine segments

✍ Scribed by Ioakim K. Spiliopoulos; John A. Mikroyannidis

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 184 KB
Volume: 64
Category: Article
ISSN: 0021-8995
DOI: 10.1002/(sici)1097-4628(19970509)64:6<1135::aid-app13>3.0.co;2-v

No coin nor oath required. For personal study only.

✦ Synopsis

Polyesters containing styrylpyridine segments were synthesized with the bisphenols 2,6-di[2-(2-hydroxy-1-naphthyl)vinyl]pyridine, 2-[2-(2-hydroxy-1-naphthyl)vinyl]-8-hydroxyquinoline, and 2-(4-hydroxystyryl)-8-hydroxyquinoline as starting materials. The polyesters were characterized by inherent viscosity measurements, Fourier transform infra-red, 1 H nuclear magnetic resonance, X-ray, differential thermal analysis, thermomechanical analysis, thermogravimetric analysis, and isothermal gravimetric analysis. The polymers were amorphous or microcrystalline and were soluble in hot, polar, aprotic solvents containing 5 wt % LiCl. They showed T g at 112-175ЊC and T m at 165-295ЊC. After heat curing, the polyesters yielded resins which were stable up to 367-335ЊC in N 2 and 347-329ЊC in air and afforded anaerobic char yields of 72-64% at 800ЊC.

📜 SIMILAR VOLUMES

Synthesis of poly(enaryloxynitrile)s con

Synthesis of poly(enaryloxynitrile)s containing styrylpyridine segments

✍ Ioakim K. Spiliopoulos; John A. Mikroyannidis 📂 Article 📅 1997 🏛 Elsevier Science 🌐 English ⚖ 530 KB

New poly(enaryloxynitrile)s bearing styrylpyridine segments were synthesized by interracial polycondensation of p-bis(1-chloro-2,2-dicyanovinyl)benzene with various bisphenols such as 6-(4-hydroxystyryl)-3-hydroxypyridine (HSHP), 2,6-di(4-hydroxystyryl)pyridine and 2-(4-h2(droxystyryl)-8-hydroxyquin

The stability of solutions in reactive m

The stability of solutions in reactive monomers of crosslinkable polyesters containing bisacid A2

✍ R. S. Lenk 📂 Article 📅 1973 🏛 John Wiley and Sons 🌐 English ⚖ 425 KB 👁 1 views

## Abstract Earlier papers^1–6^ have dealt with the synthesis and purification of bisacid A2; the preparation of unsaturated polyesters by cocondensing bisacid A2 with maleic anhydride in varying proportions in the presence or absence of phthalic anhydride as a further modifying acid, using propyle

Structure and physical properties of seg

Structure and physical properties of segmented polyurethane elastomers containing chemical crosslinks in the hard segment

✍ Zoran S. Petrović; Ivan Javni; Vladimir Divjaković 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 388 KB 👁 2 views

Two series of segmented polyurethanes, one containing 50% soft segments and the other with 70% soft segments were synthesized. Chemical crosslinks were introduced through the hard segment in a controlled way. Chemical polyurethane networks were characterized by swelling. The effect of the degree of

Mechanical and dielectric properties of

Mechanical and dielectric properties of segmented polyurethane elastomers containing chemical crosslinks in the hard segment

✍ Zoran S. Petrović; Ivan Javni; György Bánhegy 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 475 KB 👁 2 views

Mechanical and dielectric properties of two series of segmented polyurethanes having soft segment concentration of 50 and 70% and a varying degree of crosslinking through the hard segment were studied. The degree of crosslinking in each series was varied by varying the butane diol/trimethylol propan