Synthesis and characterization of poly(p-phenylene terephthalate) crystals obtained by crystallization during polymerization

Abstract

Poly(p-phenylene terephthalate) (PPTE) crystals were prepared by hightemperature solution polymerization via three different types of reaction as follows: bimolecular condensation of (1) 1,4-diacetoxybenzene and terephthalic acid and (2) hydroquinone and diphenyl terephthalate and self-condensation of (3) mono(4'-acetoxyphenyl) terephthalate. In spite of the reaction types, needle-like crystals are not obtained as found with poly(oxy-l,4-benzenediylcarbonyl) (POB) whiskers, under polymerization conditions identical with those used to produce POB whiskers. PPTE and POB have similar molecular structure that is, they comprise 1,4-phenylene groups and ester linkages. whereas the morphologies of the crystals obtained are quite different. From the structural study, PPTE crystals are single crystals, and polymer chains align perpendicular to the plane of the sheaf-like or plate-like crystal.

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References

[1] Endo S. Kimura K, Ohta T and Kato Y 1987 US Patent 4673724

[2] Kato Y , Endo S , Kimura K , Yamashita Y , Tsugita H and Monobe K 1987 Koubunshi Ronbunshu 44 35-35

(3) Yamashita Y , Kato Y , Endo S . Kimura K , Tsugita H and Monobe K 1987 Koubunshi Ronbhunshu 44 41-41

[4] Yamashita Y . Kato Y . Endo S and Kimura K 1988 Macrotmol. Chem. Rapid Commun. 9 687-687

[5] Kato Y , Yamashita Y . Kimura K , Endo S and Kajisaki K 1990 Koubunshil Ronbunshu 34 973-973

[6] Kato Y , Yamashita Y . Kimura K , Endo S and Ohta T 1990 Koubunshi Ronbunshu 47 583-583

[7] Kimura K , Endo S , Kato Y and Yamashita Y 1993 Polymer 34 1054-1054

[8] Hummel J P and Flory P J 1980 Macromolecules 13 479-479

[9] Erman B , Flocy P J and Hummel J P 1980 Macromolecules 13 484-484

10.

[10] Prichard W W 1962 Organic Syntheses, Collective Volume 3 p 452-452

11.

[11] Kaji A and Murano M 1986 Polym. Prep. Japan 35 837-837

12.

[12] Kato Y 1989 Doctoral Dissertatwn Okayama University p 48-48

13.

[13] Economy J 1984 J. Macromol. Sci.-Chem. A 21 1705-1705

14.

[14] Economy J , Volsen W , Viney C , Geiss R , Siemens R and Karis T 1988 Macromolecules 21 2777-2777

15.

[15] Muhlebach A , Lyerla L and Economy J 1989 Macromolecules 22 3741-3741