Research Institute of Forests and Rangelands Iranian Journal of Wood and Paper Science Research 1735-0913 25 1 2010 03 21 Studying from the Properties of Chemi-Mechanical Pulping and Alkaline Peroxide Mechanical Pulping of Wheat Straw Golestan province Studying from the Properties of Chemi-Mechanical Pulping and Alkaline Peroxide Mechanical Pulping of Wheat Straw Golestan province 32 47 117264 10.22092/ijwpr.2010.117264 FA Saeid Kamrani M.Sc , Wood and Paper Science Gorgan University of Agricultural Sciences and Natural Resources, Ahmad Reza Saraeyan Assistant prof., Faculty members Gorgan University of Agricultural Sciences and Natural Resources Eyman Akbarpoor M.Sc , Wood and Paper Science Gorgan University of Agricultural Sciences and Natural Resources, Journal Article 2018 09 29 In this study, mechanical and optical properties of CMP, one stage APMP and two stage APMP pulps ( from Tajan wheat straw Golestan province ) were investigated. wheat straw collected at research center of Agriculture and Natural resources of Golestan province. Fiber dimensions such as average fiber length , diameter cell , lumen and  fiber wall thickness were assessed at 1.18mm, 18.156, 11.461 and 3.396 microns, respectively. chemical  components such as cellulose , lignin , ash and extractives were assessed at 53.7, 21.1, 5.1 and 8.5 percent, respectively. Based on the preliminary experiment results, impregnation temperature was 95⁰C, impregnation times of 10, 20, 30, 40 minutes, caustic charge 10% and peroxide charge was 3% in CMP ,one stage APMP  and two stages APMP pulps. Considering pulp properties and treatment conditions, many treatments including 20 and 40 minutes treatments were selected for making of handsheet. The selected pulps were refined up to 350 ml (CSF) freeness prior to making of hasndsheet. Final results indicated that two stages APMP pulp (impregnation in time 40 minutes) had  the highest burst strength, breaking length and brightness. Also, the results of yield and tear strength showed that, there was no meaningful difference at the 5% level between three methods CMP, one and two stages of APMP pulps. In this study, mechanical and optical properties of CMP, one stage APMP and two stage APMP pulps ( from Tajan wheat straw Golestan province ) were investigated. wheat straw collected at research center of Agriculture and Natural resources of Golestan province. Fiber dimensions such as average fiber length , diameter cell , lumen and  fiber wall thickness were assessed at 1.18mm, 18.156, 11.461 and 3.396 microns, respectively. chemical  components such as cellulose , lignin , ash and extractives were assessed at 53.7, 21.1, 5.1 and 8.5 percent, respectively. Based on the preliminary experiment results, impregnation temperature was 95⁰C, impregnation times of 10, 20, 30, 40 minutes, caustic charge 10% and peroxide charge was 3% in CMP ,one stage APMP  and two stages APMP pulps. Considering pulp properties and treatment conditions, many treatments including 20 and 40 minutes treatments were selected for making of handsheet. The selected pulps were refined up to 350 ml (CSF) freeness prior to making of hasndsheet. Final results indicated that two stages APMP pulp (impregnation in time 40 minutes) had  the highest burst strength, breaking length and brightness. Also, the results of yield and tear strength showed that, there was no meaningful difference at the 5% level between three methods CMP, one and two stages of APMP pulps. https://ijwpr.areeo.ac.ir/article_117264_6cf28adb0f703438a210fa9063fb3883.pdf