异氰酸根指数对聚氨酯粉末胶粘剂性能的影响

吉林大学学报(理学版) ›› 2020, Vol. 58 ›› Issue (1): 171-176.

异氰酸根指数对聚氨酯粉末胶粘剂性能的影响

孙明芬^1,2, 任秀娥¹, 廖泽鹏¹, 王洪艳¹, 何雯筠¹, 孟凡欣²

1. 吉林大学珠海学院化工与新能源材料学院, 广东珠海 519041； 2. 吉林大学珠海学院药学与食品科学学院, 广东珠海 519041

收稿日期:2019-05-05 出版日期:2020-01-26 发布日期:2020-01-12
通讯作者: 任秀娥 E-mail:renxiue19@jluzh.edu.cn

Effects of Isocyanate Index on Properties of Polyurethane Powder Adhesives

SUN Mingfen^1,2, REN Xiu’e¹, LIAO Zepeng¹, WANG Hongyan¹, HE Wenjun¹， MENG Fanxin^2

1. School of Chemical Engineering and New Energy Materials, Zhuhai College of Jilin University, Zhuhai 519041, Guangdong Province, China；2. School of Pharmacy and Food Science, Zhuhai College of Jilin University, Zhuhai 519041, Guangdong Province, China

Received:2019-05-05 Online:2020-01-26 Published:2020-01-12
Contact: REN Xiu’e E-mail:renxiue19@jluzh.edu.cn

摘要/Abstract

摘要： 以聚己二酸一缩二乙二醇酯二醇、异佛尔酮二异氰酸酯、 1,4-丁二醇和二羟甲基丙酸为主要原料, 先用丙酮法合成聚氨酯预聚体, 再通过溶液聚合法进行分散造粒, 制备单组分聚氨酯粉末胶粘剂. 用Fourier变换红外光谱（FTIR）、凝胶渗透色谱（GPC）、差示扫描量热法（DSC）及热重分析（TG）等方法考察异氰酸根指数（R值）对聚氨酯粉末胶粘剂性能的影响. 结果表明: 随着预聚体R_总值的增加, 分散液的扩链和封端作用使粉末胶的分子量增大, 结晶性增强, T型剥离强度升高, 耐热性增强; 制备的聚氨酯粉末胶粘剂符合工业低温施胶要求.

关键词: 聚氨酯, 粉末胶粘剂, 异氰酸根指数, T型剥离强度, 热稳定性

Abstract: Using polyethylene adipate diethylene glycol diol with a molecular weight of 3 000 and isophorone diisocyanate, 1,4-butanediol, dimethylolpropionic acid as main raw materials, we first synthesized polyurethane prepolymers by acetone method, then dispersed and granulated by solution polymerization method to prepare onecomponent polyurethane powder adhesives (PPA). The effects of isocyanate index (R) on the properties of the polyurethane powder adhesives were inve
stigated by means of Fourier transform infrared spectrometer (FTIR), gel permeation chromatography (GPC), differential scanning calorimeter (DSC) and thermogravimetric analysis (TG), etc. The results show that with the increase ofR_total value of prepolymer, the molecular weight and the crystallinity of PPA are increased, the Tpeel strength and the thermal stability of PPA are enhanced. The prepared polyurethane powder adhesives meet the demands for industrial lowtemperature sizing.

Key words: , polyurethane, powder adhesive, isocyanate index, Tpeel strength, thermal stability

中图分类号:

孙明芬, 任秀娥, 廖泽鹏, 王洪艳, 何雯筠, 孟凡欣. 异氰酸根指数对聚氨酯粉末胶粘剂性能的影响[J]. 吉林大学学报(理学版), 2020, 58(1): 171-176.

SUN Mingfen, REN Xiu’e, LIAO Zepeng, WANG Hongyan, HE Wenjun, MENG Fanxin. Effects of Isocyanate Index on Properties of Polyurethane Powder Adhesives[J]. Journal of Jilin University Science Edition, 2020, 58(1): 171-176.

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