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Studies on the Development of High Quality Materials by means of Compositing Wood with Synthetic Polymers

木材与合成聚合物复合开发优质材料的研究

基本信息

批准号：
01860022
负责人：
SHIRAISHI Nobuo
金额：
$ 5.44万
依托单位：
Kyoto University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research
财政年份：
1989
资助国家：
日本
起止时间：
1989 至 1991
项目状态：
已结题

项目摘要

The wood-using industries generate a large amount of by-product wastes during product manufacturing. For complete utilization of wood resources, many attempts have been done to prepare thermoplastic and thermosetting composites containing ligno-cellulosic fillers or resins. In conjunction with this research, there occurs national research projects during these two years and several advancements have been achieved. The results obtained in this research are as follows : (1) Composites of thermo-mechanical pulp (TMP) with polypropylene (PP) were prepared with modified PPs by maleic anhydride (MPP), glycidyl methacrylate and hydroxyethyl methacrylate. Modified PPs having groups reactive toward hydroxyl groups of woody fillers can improve the tensile strength of the molded composites, and can be tised as compatibilizers in TMP-PP composites. It has been proved by gravimetric, IR, TEM-EDXA analyses and others that these reactive modified PPs are localized at the interface between the woody f … More iller and PP, and that grafting of MPP is attained onto the surface sites of woody filler, which enhances adhesion between filler and matrix polymer. (2) Methods for processing TMP-PP composites were investigated. The addition of maleic anhydride onto, PP was accomplished with an initiator, followed by keading of the products with TMP with antioxidants. The tensile strengths of the resulting composites become 10% greater than those of composites prepared by kneading of MPP, PP and TMP. (3) Composites of TMP with ABS, AS resins and polyphenylene oxide were investigated, resulting in composites with enhanced physical properties. (4) Novolak type moldings could be prepared from untreated wood-phenol liquefied solutions. from which unreacted phenol was distilled off under reduced pressure. The wood-phenol liquefied and reacted powders thus obtained can be cured directly, when wood meal fillers and hexamethylenetetramine are added and hot-pressed at 155-180 ﾟC. Injection molding was found to be possible with the wooden resin. The flexural strengths of the molding were found to be comparable with those for commercial novolak-moldings. Less

木材工业在产品制造过程中产生大量的副产品废物。为了充分利用木材资源，已经进行了许多尝试来制备含有木质纤维素填料或树脂的热塑性和热固性复合材料。与此研究相结合，在这两年中发生了一些国家研究项目，并取得了一些进展。（1）采用马来酸酐（MPP）、甲基丙烯酸缩水甘油酯（GMA）和甲基丙烯酸羟乙酯（HEA）对聚丙烯（PP）进行改性，制备了热机械浆（TMP）/PP复合材料。对木质填料的羟基具有反应性基团的改性PP可提高模塑复合材料的拉伸强度，可作为TMP-PP复合材料的增容剂。通过重量分析、IR、TEM-EDXA等分析手段证明，这些反应性改性PP主要分布在木质纤维与木质纤维的界面上， ...更多信息填料与基体聚合物之间粘接性增强，MPP接枝到木质填料的表面。(2)研究了TMP-PP复合材料的加工方法。用引发剂将马来酸酐加成到PP上，然后用TMP和抗氧剂将产物进行共混。所得复合材料的拉伸强度比由MPP、PP和TMP捏合制备的复合材料的拉伸强度高10%。(3)研究了TMP与ABS、AS树脂和聚苯醚的复合材料，得到了物理性能提高的复合材料。(4)酚醛清漆型模塑制品可由未经处理的木材-苯酚液化溶液制备。在减压下从其中蒸馏出未反应的苯酚。所得木酚液化反应粉末，加入木粉填料和六次甲基四胺，在155-180 ℃热压，可直接固化。注塑成型被认为是可能的木制树脂。发现模塑的弯曲强度与商业酚醛树脂模塑的弯曲强度相当。少