Formation and structure of amorphous carbon char from polymer materials

被引：30

作者：

Lawson, John W. ^{[1
]}

Srivastava, Deepak ^{[1
]}

机构：

[1] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA

来源：

PHYSICAL REVIEW B | 2008年 / 77卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.77.144209

中图分类号：

T [工业技术];

学科分类号：

08 [工学];

摘要：

Amorphous carbonaceous char produced from burning polymer solids has insulating properties that make it valuable in thermal protection and fire-retardant systems. A pyrolytic molecular dynamics simulation method is devised to study the transformation of the local microstructure from virgin polymer to a dense, disordered char. Release of polymer hydrogen is found to be critical to allow the system to collapse into a highly coordinated char structure. Mechanisms of the char formation process and the morphology of the resulting structures are elucidated.

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页数：6

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