首页   按字顺浏览 期刊浏览 卷期浏览 Non‐Gaussian Behavior of Model Short‐Chain Polymers
Non‐Gaussian Behavior of Model Short‐Chain Polymers

 

作者: Jack B. Carmichael,  

 

期刊: Journal of Applied Physics  (AIP Available online 1964)
卷期: Volume 35, issue 11  

页码: 3178-3181

 

ISSN:0021-8979

 

年代: 1964

 

DOI:10.1063/1.1713196

 

出版商: AIP

 

数据来源: AIP

 

摘要:

The set of end‐to‐end vectors (hereafter called the discrete‐state distribution) for a model polymer chain ofnbonds has been generated for a three rotational state model on the B‐5000 computer. Equally probablegauche‐right,trans, andgauche‐left states are assumed. The discrete‐state distribution is determined for a polydimethylsiloxane chain withn=6, 8, 10 and a polyethylene chain withn=6, 8. For a polyethylene chain of six links the calculated distribution is shown to differ substantially from a normalized Gaussian. For each case, a function is obtained for the discrete‐state distribution through the Gram‐Charlier technique of expanding an unknown functionf(x) in terms of a Gaussian function. The Gram‐Charlier expansion is shown to give a reasonable fit to the discrete‐state distribution. The distributionf(x) is shown to more accurately predict the equilibrium formation of octamethylcyclotetrasiloxane in a dimethylsiloxane polymer than does the Gaussian distribution. The problem of excluded volume is not considered for the short chains treated here.

 

点击下载:  PDF (290KB)



返 回