Crystalline structure in isocyanate reactive hot melt adhesives

被引：34
作者：
Cui, YJ [1 ]
Chen, DH [1 ]
Wang, XL [1 ]
Tang, XZ [1 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Technol, Res Inst Polymer Mat, Shanghai 200240, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES | 2002年 / 22卷 / 04期
关键词：
hot melt; polyurethane; reactive;
D O I：
10.1016/S0143-7496(02)00010-6
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Isocyanate reactive hot melt adhesives (RHMA) are low molecular isocyanate-capped prepolymers prepared from polyester and or polyether glycols and diisocyanates. After application, RHMA exhibit green strength by solidification while cooling to room temperature. Polarizing optical microscope observation revealed that the crystal of isocyanate prepolymer consisted in spherulites. RHMA prepolymer with higher crystal content showed better green strength but slower adhesion development as a result of hindrance to moisture diffusion by the crystalline structure. Crystalline Structure wits disrupted by the penetration of crosslinking reactions. Heat of crystallization and onset crystallization temperature in cooling traces of cured RHMA melt was reduced by the interruption of crosslinked bonding. Crystalline Structure was proved to play an important part in the Curing process of the isocyanate RHMA. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：317 / 322
页数：6
相关论文
共 50 条
[21]   Sodium montmorillonite intercalated with poly(ethylene glycol): a modifier of reactive hot-melt polyurethane adhesive [J].
Jeong, Han Mo ;
Kim, Dae Hoon ;
Yoon, Koo Sik ;
Jung, Jin Su ;
Kim, Yong Sung ;
Kim, Tae Kyoon ;
Cho, Yang Lae ;
Hwang, Jeong Mi .
JOURNAL OF ADHESION SCIENCE AND TECHNOLOGY, 2007, 21 (09) :841-853
[22]   Acidic wood extractives accelerate the curing process of emulsion polymer isocyanate adhesives [J].
Oezparpucu, Merve ;
Sanchez-Ferrer, Antoni ;
Schuh, Mathias ;
Wilhelm, Bianca ;
Sarkar, Riddhiman ;
Reif, Bernd ;
Windeisen-Holzhauser, Elisabeth ;
Richter, Klaus .
JOURNAL OF APPLIED POLYMER SCIENCE, 2022, 139 (21)
[23]   Influence of polymer structure on melt miscibility of ternary polymer blends: A model for high performance polyurethane adhesives and coatings [J].
Duffy, DJ ;
Heintz, AM ;
Stidham, HD ;
Hsu, SL ;
Suen, W ;
Chu, W ;
Paul, CW .
JOURNAL OF ADHESION, 2003, 79 (11) :1091-1107
[24]   Adhesion and viscoelastic property of poly(ethylene-co-vinyl acetate) based hot melt adhesives- effects of tackifier and wax [J].
Chu, Hou-Hsein ;
Huang, Wen-Hsiu ;
Chuang, Kuang Sein ;
Shen, Bei-Huw .
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES, 2020, 99
[25]   A case of contact dermatitis caused by a polyurethane hot melt adhesive [J].
Ito-Watanabe, Mana ;
Hayama, Koremasa ;
Fujita, Hideki ;
Sasaki, Kazumi ;
Numata, Mitsuru ;
Terui, Tadashi .
CONTACT DERMATITIS, 2019, 81 (05) :389-+
[26]   Preparation of isocyanate microcapsules by interfacial polymerization/in-situ polymerization and their application in wood adhesives [J].
Ma, Yangbao ;
Song, Jixuan ;
Jiang, Yan ;
Zhang, Yanhua ;
Gu, Jiyou .
JOURNAL OF ADHESION, 2022, 98 (16) :2689-2705
[27]   Biomass upcycling of waste rPET to higher-value new-easy-recyclable microcellular thermoplastic (co)polyamide foams and hot-melt adhesives [J].
Ranganathan, Palraj ;
Chen, Yu-Hao ;
Rwei, Syang-Peng ;
Lee, Yi-Huan .
MATERIALS TODAY CHEMISTRY, 2022, 26
[28]   Thermal annealing behavior and structure development of crystalline hard segment domain in a melt-quenched thermoplastic polyurethane [J].
Yanagihara, Yu ;
Osaka, Noboru ;
Murayama, Satoshi ;
Saito, Hiromu .
POLYMER, 2013, 54 (08) :2183-2189
[29]   Effect of Isocyanate Hard Segment on Structure and Property of Polyurethane [J].
Liu C. ;
Shi Y. ;
Ma C. ;
Liu L. ;
Liu Z. ;
Que Y. ;
Wang L. .
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering, 2021, 37 (03) :79-84
[30]   Isocyanate crosslinked reactive starch nanoparticles for thermo-responsive conducting applications [J].
Valodkar, Mayur ;
Thakore, Sonal .
CARBOHYDRATE RESEARCH, 2010, 345 (16) :2354-2360
12345