Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (11): 64-68.doi: 10.3969/j.issn.1000-565X.2010.11.012

• Chemistry & Chemical Engineering • Previous Articles     Next Articles

A Mathematical Model Describing Light-Induced Yellowing of BCTMP Based on Regression Analysis

Chen Gang  Wen Ai    

  1. State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2010-01-29 Revised:2010-06-03 Online:2010-11-25 Published:2010-11-25
  • Contact: 陈港（1967-），男，教授，主要从事特种纸与功能纸制品的研究． E-mail:papercg@seut．edu．cn
  • About author:陈港（1967-），男，教授，主要从事特种纸与功能纸制品的研究．
  • Supported by:

    教育部新世纪人才支持计划项目（D608001Ⅲ）; 粤港关键领域重点突破项目（200849834）

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Abstract:

In this paper,first,the Bleached Chemical Thermal-Mechanical Pulps（BCTMPs） of poplar,fir and maple were irradiated with UV light to accelerate the yellowing.Then,the variations of brightness（R） and yellowing number（PC number） of these three kinds of BCTMPs during the light-induced yellowing were investigated.Finally,a model to describe the variations of brightness and PC number with the irradiation time is established based on regression analysis.Analytical results show that there is a linear relationship between PC number and b＊ and a sub-linear relationship between lg t and R as well as PC number.Experimental results indicate that the proposed model is generally applicable.

Key words: Bleached Chemical Thermal-Mechanical Pulp, light-induced yellowing, brightness, regression analysis