摘要
采用乙烯基类系列单体———丙烯腈 (AN)、甲基丙烯酸甲酯 (MMA)、丙烯酸 (AA)三元共聚单体注入西南桤木木材中 ,制成新型的高分子复合材料 (AMA WPC)。单体的注入用满细胞法 ,聚合用热引发法 ,并采用添加氯化锌对木材细胞壁进行活化等工艺对木塑复合材进行了研究和分析。实验样品按照国标GB192 7-194 3有关规定进行测试 ,并结合傅立叶红外光谱和扫描电镜探讨了各因素对AMA WPC材料接枝率及性能的影响。结果表明 :改性后西南桤木木塑复合材料具有优异的物理、力学性能。与素材相比较 ,AMA WPC的密度提高了 5 9 8% ,顺纹抗压强度提高了 76 7% ,抗弯强度提高了 90 4 % ,抗弯弹性模量提高 2 2 2 % ,端面硬度提高 10 2 3% ,径面硬度提高 15 3 6 % ,弦面硬度提高 15 2 2 % ,吸水率降低 5 6 7% ,湿膨胀率降低 19 0 %。
The natural wood Alder was mainly impregnated by vinyl monomers, which mixed in with acrylonitrile (AN), methyl methacrylate (MMA) and acrylic acid (AA) that produced ternary polymerization (AMA) in the experiment. The new\|style macromolecule organic polymers material (AMA\|wood) was made by thermochemical manufacturing processes. The experimental method below includes the wood impregnation with vinyl monomers by full\|cell pressure mehtod and the heat treatment of impregnated wood by heat\|initiator method producing vinyl WPC. At the same time ZnCl 2 adding into the cell walls activated Alder. Studies probe some of the physical\|mechanical properties and forming behavior of wood polymer composite material by the national standard (GB1927-1943) . Other operating properties such as graft loading, microscopic structure have been considered and compared with those of natural wood by means of FTIR and scanning electron microscope. The data presented suggest that physics\|mechanical properties of WPC\|Alder are much better than in unmodified wood. Density, compressive strength parallel to grain of wood, bending strength, static bending, hardness of cross section, hardness of radial section, hardness of tangential section are among these, which is increased by 59 8%, 76 7%, 90 4%, 22 2%, 102 3%, 153 6%, 152 2% respectively. The water absorption of AMA\|wood is 56 7% lower, as well as the swelling of AMA\|wood 19 0% lower than that of natural wood.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2003年第3期98-105,共8页
Scientia Silvae Sinicae
基金
国家自然科学基金资助项目 ( 3 9970 5 96)部分内容
云南省自然科学基金 ( 1999C0 0 60M)
西南林学院院基金项目联合资助
关键词
西南地区
桤木
木塑复合材料
乙烯基类
系列单体
物理性质
力学强度
Alder( Alnus nepalensis D. Don), Wood polymer composites (WPC), Vinyl monomers, Physical properties, Mechanical strength
