%0 Journal Article
%T CORRELATION BETWEEN CELLULOSIC PULP CHEMICAL CHARACTERISTICS AND PAPER OPTICAL AND PHYSICAL MECHANICAL PROPERTIES
%A Antonio Jos¨¦ Vinha Zanuncio
%A Jorge Luiz Colodette
%A Rubens Chaves de Oliveira
%J Revista Ci¨ºncia da Madeira
%D 2011
%I Federal University of Pelotas
%X The knowledge about chemical characteristics of pulp is important in the process of papermaking. This study aimed to correlate the chemical characteristics of pulp with the optical and physical-mechanical properties of paper. The determination of optical properties and physical-mechanical paper were made by the TAPPI (1992) norms. The carbohydrate composition of the bleached pulps was adapted from the Tappi T 249 cm-85 procedure and hexenuronic acids were determined by the Vuorinen (1996) method. The content of xylan showed an r= -0.3411 for the tensile index; r= 0.3307 for the tear index; r= 0.5587 resistance to air flow and r= 0.4504 for opacity. The content of glycans showed r= 0.2534 for the tensile index; r= -0.3950 for the tear index; r= -0.078 and for resistance to air flow and r= 0.5870 for opacity. The hexenuronic acids showed r= -0.2517 for the tensile index; r= -0.2433 for the tear index; r= 0.2028 for the resistance to air flow and r= -0.7245 for opacity The comparison among the samples showed none significance with the F test. This indicates that the chemical characteristics of the pulp do not influence the optical properties and physical and mechanical properties of paper. Conhecer as caracter   -sticas qu   -micas da polpa celul   3sica      fundamental no processo de fabrica   ¡ì   ¡êo do papel. Este trabalho teve como objetivo correlacionar as caracter   -sticas qu   -micas da polpa celul   3sica com as    3pticas e f   -sico-mec   ¡énicas do papel. Foram determinadas as propriedades    3pticas e f   -sico-mec   ¡énicas do papel, a composi   ¡ì   ¡êo polissacar   -dica das polpas branqueadas e os     cidos hexenur   ¡änicos. O teor de xilanas mostrou r= -0,3411 para o    -ndice de tra   ¡ì   ¡êo; r= 0,3307 para o rasgo; r= 0,5587 para a resist   ancia      passagem de ar e r= 0,4504 para a opacidade. O teor de glicanas mostrou r= 0,2534 para o    -ndice de tra   ¡ì   ¡êo; r= -0,3950 para o    -ndice de rasgo; r= -0,078 para a resist   ancia     passagem de ar e r = 0,5870 para a opacidade. Os     cidos hexenur   ¡änicos mostraram r= -0,2517 para o    -ndice de tra   ¡ì   ¡êo; r= -0,2433 para o de rasgo; r= 0,2028 para a resist   ancia      passagem de ar e r= -0,7245 para a opacidade. As compara   ¡ì   ¦Ìes amostradas n   ¡êo foram significativas.     Sendo assim, o estudo aponta para o fato de que as caracter   -sticas qu   -micas da polpa celul   3sica n   ¡êo influenciam nas propriedades    3pticas e f   -sico-mec   ¡énicas do papel.
%U http://www.ufpel.edu.br/revistas/index.php/cienciadamadeira/article/view/72