【摘要】：為拓展木質復合材料在鐵路軌枕、機電產品包裝等特殊工程領域的應用,研制了9層木橡復合層積材(LLVR)。設計了5種木/橡層積結構,單元為楊木單板和氯丁橡膠(CR)片。采用分層施膠的工藝,即異氰酸酯PAPI用于木橡間膠合,涂布量80 g·m~(-2),添加質量分數9%硅烷偶聯劑KH69;酚醛樹脂PF用于楊木單板間膠合,涂布量200 g·m-2。熱壓工藝為溫度160℃、壓力1.5 MPa、時間10 min。根據國家標準GB/T 17657測試了膠合強度、彎曲強度、彎曲模量及24 h吸水厚度膨脹率。模擬實際承載特征,設計了5周期"加載—卸載"加壓試驗,重點揭示LLVR對周期性橫向壓載的力變及吸能響應特性。結果表明:木材與橡膠層積復合開發(fā)鐵路軌枕、機電產品包裝等特殊工程材料是可行的;LLVR具有優(yōu)異的力學強度、濕穩(wěn)定性和殘余彈性形變吸能緩沖性能;推薦采用表層橡膠包覆的層積結構。
[Abstract]:In order to expand the application of wood composite materials in railway sleepers, mechanical and electrical products packaging and other special engineering fields, a 9-layer wood rubber composite laminate (LLVR). Was developed. Five kinds of wood / rubber laminated structures were designed with poplar veneer and Chloroprene rubber (CR) sheet. The technology of layering sizing, I. e., isocyanate PAPI was used to glue wood and rubber, the coating amount was 80 g m2, and 9% silane coupling agent KH69; phenolic resin PF was added for poplar veneer gluing. The coating amount was 200g m ~ (-2). Hot pressing process: temperature 160 鈩，

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