Basic research on new evalution method of durability of wood adhesive for structural use.

结构用木材胶粘剂耐久性评价新方法的基础研究

基本信息

批准号：
60302082
负责人：
MIZUMACHI Hiroshi
金额：
$ 4.93万
依托单位：
The University of Tokyo
依托单位国家：
日本
项目类别：
Grant-in-Aid for Co-operative Research (A)
财政年份：
1985
资助国家：
日本
起止时间：
1985 至 1987
项目状态：
已结题

项目摘要

We have promoted multilateral and general research concerning durability of wood adhesive for structural use, involving Japanese leading wood adhesive scientists. We report here the results of three-year research as follows.Group A took charge of molecular design and synthesis of adhesive and analysis of its chemical property. They made a basic study on utilization of lignin, tannin, and organic solvent soluble wood for adhesive materials in addition to phenol or urea resins, and indicated the possibility of developing useful adhesive for stuctural use by controlling the reaction process in synthesizing adhesive and chemical properties of cured materials.Group B took charge of mechanical properties of materials, and evaluated the adhesive properties after detailed characterization of structure and mechanical properties for various adhesives. It turned out that the rheological feature of strength or adhesive durability became apparent. In the analysis of fracture mechanism for bonded materials, basic data on the relation between fracture toughness and adhesive properties were accumulated.Group C evaluated the durability of wood-based material and adhesive through repeated load test, repeated moisture test, and various exposure tests which were similar to condition for practical usage.Adhesion is a complicated phenomenon depending on large number of factors. In order to clarify its mechanism, the approach from various aspects, such as chemistry, physical chemistry, rheology, fracture mechanics, polymeric material science, and wood technology, and putting them together are considered essential. In this research, the durability of adhesive which is most important in the field of wood industry was evaluated through the above method and significant result was given. This result will be a powerful footing in order to establish both scientific and universal evaluation method of adhesive durability.

我们促进了有关木材粘合剂在结构使用方面的耐用性的多边和一般研究，涉及日本领先的木材粘合剂科学家。我们在这里报告了三年研究的结果。集团A负责分子设计和粘合剂的合成以及对其化学特性的分析。他们对木质蛋白，单宁和有机溶剂溶剂的利用进行了基本研究，除了苯酚或尿素树脂外，还对粘合剂材料进行了粘合材料的利用，并指出，通过控制合成的固化材料的粘附和化学性质的胶合性和化学性质的粘合性和化学性质的粘附性，并表明有可能开发有用的粘合性胶粘剂，并通过控制材料的粘合性和化学性质。用于各种粘合剂。事实证明，强度或粘合剂耐用性的流变特征变得显而易见。在分析键合材料的断裂机制中，积累了有关断裂韧性和粘合性特性之间关系的基本数据。集团C评估了通过重复负载测试，重复的水分测试以及各种与实际用途相似的状态的暴露测试，评估了基于木材的材料和粘合剂的耐用性。用于实际用途的条件。粘附是一种复杂的现象，依赖于大量的因素。为了阐明其机制，从化学，物理化学，流变学，断裂力学，聚合物材料科学和木材技术等各个方面的方法以及将它们整合在一起被认为是必不可少的。在这项研究中，通过上述方法评估了在木材工业领域最重要的粘合剂耐用性，并给出了显着结果。该结果将是一个强大的基础，以建立粘合剂耐用性的科学和通用评估方法。