【摘要】 为解决杨木作胶合板材的无毒耐腐性处理,本文用乙酰化单板提高杨木胶合板耐腐性的试验表明,乙酰化具有无毒抗腐作用,处理材的尺寸稳定,材色稍深但素雅均匀。乙酰化杨木胶合板对腐朽菌具有较大的抗力。更多还原

【Abstract】 Natural durability of poplar wood is very low.The samples of 3 species(Populus deltoides cv."Harvard"(ex.1-63/51),Populus euramericana cv."SanMartino"(ex.1-72/58),Populus tomentosa Carr.)were exposed to wood destroy-ing fungus (Lenzites trabea Pers.ex Fr.) for a month and a half in thestandard soil block test.The results indicated:1) The mean weight lost ofuntreated solid wood was around 40 percent,but plywood’s about 35 percentthat was slightly lower than the wood.2)The mean weight lost of poplarplywood was threefold as large as ash’s and bass’s.Therefore,it is veryimportance for improving the durability of the poplar wood which used asraw material of plywood. Acetylation of poplar veneer in the vapor phase with anhydride has beencarried out by using potassium acetate as catalyst and D.M.F.as swellingagent. Acetylation is a effective treatment of nontoxic type against biologicaldeterioration.Before or after decay testing,the weight of the acetylatedplywood is much the same.It shows that the acetylation of veneer can bringabout marked improvement in durability of poplar plywood.更多还原