木材和禾草木素中非环α-芳醚键的测定

Estimation of non-cyclic α-aryl ether units in wood and gramineous lignins

马尾松和禾草类原料在酸催化水解过程中酸羟基的动力学变化分为快慢两个阶段，测定酸催化水解过程中术素酚羟基含量的增值，可推算原料木素中非坏α-芳醚键的含量。结果表明，马尾松成熟材木素中非坏α-芳醚键为3．0％，略低于幼龄材的3．5％；皂化后麦草、芦苇和苦竹木素中该键型的含量分别为3．7％、3．7％和2．9％。

The kinetic curves of acid-catalyzed chawees of aryl-ether lindages in wood and gramineous lignins dispinyed sAnilar patterns inditaling a two-stage process. The amounts of non-cyclic aaryl ether units were determined for lignin in situ from the rate of acid-catalyzed phenolic hydroxyl groups formation. Expressed as a percentaxe of C9 units hawhg this type of structure feature, the mature masson's pine (pinus massoniana Lamb) had 3.0 lower than the juvenile which had 3. 5. The wheat straw, reed and bamboo had 3. 7, 3.7and 2. 9, respeetively,after mponification.