Preparation and Characterization of Isocyanate Adhesive Based on Soybean Oil for Wood Bonding | 木材用大豆油基异氰酸酯胶黏剂的制备与表征
2013
Zhang Yadong, Northeast Forestry University, Harbin(China),College of Material Science and Technology | Gu Jiyou, Northeast Forestry University, Harbin(China),College of Material Science and Technology | Zheng Zhifeng, Southwest Forestry University, Kunming (China),College of Materials Engineering
chinois. 以大豆油为原料制备多元醇,代替传统的聚醚多元醇,合成木材用单组分室温湿固化型植物油基异氰酸酯胶黏剂。使用FTIR、TG和DTG对胶黏剂的结构和热稳定进行分析,讨论大豆油基多元醇的羟值、用量和NCO/OH比例对胶黏剂贮存期、胶接强度和热稳定性等性能的影响。结果表明：当羟值为69mgKOH・g-1、SOP/PEG摩尔比为20%、R=7、固含量为80%时,制备的异氰酸酯胶黏剂最终CPS达到21.06MPa,贮存期大于3个月,湿循环CPS达到12.04MPa,比PEG/PAPI体系提高26.01%,热稳定也有显著提高。
Afficher plus [+] Moins [-]anglais. One-component isocyanate adhesive with moisture curing at room temperature has been prepared from polyols derived from soybean oil which is in order to substitute for traditional polyether polyols, their structures and thermal stability were assessed by FTIR, TG and DTG. It studied the effect of hydroxyl value, dosage and NCO/OH molar ratio on the pot life, bonding strength and thermo stability of adhesive. It indicated that, under the condition that the 69 mgKOH・g-1 hydroxyl value of soybean oil-based polyol, the 20%SOP/PEG molar ratio, the 7 R value and the 80% solid content, the final CPS of isocyanate adhesive was 21.06 MPa, pot life was more than three months, Wet circulation strength was 12.04 MPa which was higher 26.01% than that of PEG/PAPI system, and the adhesive had a higher thermal stability.
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