| It is known to all that the timbering which expand with wet and contract with dry don't have the thermoplastic property and good compatibility with plastic. In this paper, with the method of esterification and etherification on poplar, the writer did some research to improve the timbering's interfacial compatibility with plastic, and to reduce the hot melt temperature and water affinity of timbering.(1) The diversification between untreated and esterified or etherified timbering was tested by modern analytical instruments. From the DSC figure, we can get the conclusion that the hot melt temperature of benzylated wood reduce to about 100℃. It can be seen from the SEM and X-ray figures that because of the benzylation, the wood's crystal structure disappear. The FTIR figures show that after benzylation, the etherification effect is obvious and the hydroxyl is replaced by benzyl.(2) Researching in the moisture absorption and dimension stability, we found that the benzylated wood have better hydrophobic nature. The rate of dimension growth is only 3.1%.(3) The timbering's interfacial compatibility with plastic was studied by DSC, SEM and CAM. The results show that the benzylated wood has good interfacial compatibility with polythene. At the melting point temperature of polythene, the benzylated wood have good thermo plasticity. The surface free energy, polarity, non-polarity are all approximate between benzylated wood and polythene.(4) The technology of benzylation of fast-growing poplar veneer was researched by orthogonal trials. On the basement of technology research, a sort of high-powered surface lining of plastified veneer was empoldered. This surface lining have good mechanic performance and dimension stability.
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