【摘要】：為拓展木質(zhì)復(fù)合材料在鐵路軌枕、機(jī)電產(chǎn)品包裝等特殊工程領(lǐng)域的應(yīng)用,研制了9層木橡復(fù)合層積材(LLVR)。設(shè)計了5種木/橡層積結(jié)構(gòu),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(zhì)量分?jǐn)?shù)9%硅烷偶聯(lián)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(jù)國家標(biāo)準(zhǔn)GB/T 17657測試了膠合強(qiáng)度、彎曲強(qiáng)度、彎曲模量及24 h吸水厚度膨脹率。模擬實(shí)際承載特征,設(shè)計了5周期"加載—卸載"加壓試驗(yàn),重點(diǎn)揭示LLVR對周期性橫向壓載的力變及吸能響應(yīng)特性。結(jié)果表明:木材與橡膠層積復(fù)合開發(fā)鐵路軌枕、機(jī)電產(chǎn)品包裝等特殊工程材料是可行的;LLVR具有優(yōu)異的力學(xué)強(qiáng)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(jié)構(gòu)。
[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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