MESOPHASE PITCHES PREPARED FROM METHYLNAPHTHALENE BY THE AID OF HF/BF3

被引：79

作者：

KORAI, Y ^{[1
]}

NAKAMURA, M ^{[1
]}

MOCHIDA, I ^{[1
]}

SAKAI, Y ^{[1
]}

FUJIYAMA, S ^{[1
]}

机构：

[1] MISTUBISHI GAS CHEM CO LTD,KURASHIKI,OKAYAMA 712,JAPAN

来源：

CARBON | 1991年 / 29卷 / 4-5期

关键词：

ALKYLATED MESOPHASE PITCH; CARBON FIBER; HF/BF3; METHYLNAPHTHALENE; SPINNING; STABILIZATION;

D O I：

10.1016/0008-6223(91)90121-X

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Mesophase pitches were prepared from methylnaphthalenes using HF/BF3 as a catalyst to improve their spinning and stabilization properties in comparison with those from naphthalene. Methylnaphthalene-derived mesophase pitch carried a number of methyl groups in addition to naphthenic groups which were introduced by nondehydrogenative polymerization reaction of naphthalene rings. Many methyl groups in methylnaphthalene were left in the mesophase pitch to be very effective for lowering the softening point and improving the spinnability and stabilization reactivity, stabilization being achieved within 10 minutes at 270-degrees-C. It was found that the methyl group migrated between 1-and 2-positions on the naphthalene ring in the presence of super strong acid of HF/BF3, giving the same structure and properties of mesophase pitches regardless of its positions in the starting materials. Effects of the methyl group on the reactivity and structural changes of the stabilization were discussed based on the infrared (IR) spectra.

引用

页码：561 / 567

页数：7