freepeople性欧美熟妇, 色戒完整版无删减158分钟hd, 无码精品国产vα在线观看DVD, 丰满少妇伦精品无码专区在线观看,艾栗栗与纹身男宾馆3p50分钟,国产AV片在线观看,黑人与美女高潮,18岁女RAPPERDISSSUBS,国产手机在机看影片

正文內(nèi)容

復(fù)合工藝對(duì)輕質(zhì)木塑復(fù)合材料性能的影響畢業(yè)論文(已修改)

2025-01-28 12:07 本頁(yè)面
 

【正文】 論文題目:復(fù)合工藝對(duì)輕質(zhì)木塑復(fù)合材料性能的影響學(xué) 院: 材料工程學(xué)院 專業(yè)年級(jí): 材料科學(xué)與工程20xx級(jí) 學(xué) 號(hào): 姓  名: 指導(dǎo)教師、職稱: xxx教授 20xx年xx月xx日 Influence of pound technology on Properties of light weight WoodPlastic Composites materials College: Material Engineering College Specialty and Grade: Materials Science and Engineering,20xx Number:    Name:   Advisor: professor xxx Submitted time: xxxx,20xx 福建農(nóng)林大學(xué)本科畢業(yè)論文目 錄摘 要 1關(guān)鍵詞 1Abstract 2Key words 21 引言 3 3 研究?jī)?nèi)容及意義 42 試驗(yàn)原料與試驗(yàn)方法 4 試驗(yàn)原料 4 材料 4 儀器 4 試驗(yàn)方法 5: 5 6 63 結(jié)果與討論 10 10 10 11 12 134 結(jié)論 144.1 結(jié)論 14 存在的問(wèn)題與建議 14參考文獻(xiàn) 16致謝 17福建農(nóng)林大學(xué)本科畢業(yè)論文摘 要:本文利用木纖維與聚苯乙烯制備復(fù)合材料,分析熱壓時(shí)間、熱壓溫度、塑料配比等工藝因子對(duì)復(fù)合材料性能的影響,確定制得最佳材料性能的復(fù)合工藝條件。結(jié)果表明,當(dāng)溫度為140℃、熱壓時(shí)間為7min、所得復(fù)合板的各項(xiàng)性能最佳。溫度較高時(shí),木纖維降解加劇,塑料熔融,性能反而有所下降。熱壓時(shí)間過(guò)短時(shí),木材發(fā)泡不充分,內(nèi)結(jié)合強(qiáng)度較差;木塑比為10:3時(shí)效果最好,內(nèi)結(jié)合強(qiáng)度低,吸水膨脹率高,塑料含量高時(shí),靜曲強(qiáng)度低。通過(guò)極差分析得,本研究的最佳工藝條件為:熱壓溫度為140℃,熱壓時(shí)間為7分鐘,木塑比為10:3。關(guān)鍵詞:木纖維;可發(fā)性聚苯乙烯;復(fù)合工藝1Abstract: The influence of the process factors on the physical properties of woodplastic posites was investigated. Polystyrene and Xylem fiber were used as the main raw material , and the various process factors such as different kinds of plastics , the mixing ratio between the wood material and its plastic counter part and hot pressing temperature,were examined. The results show that When the temperature is 140 ℃, hot pressing time was 7min, WPC mass ratio of , made the best performance of posite panels . At extremely high temperature the wood fiber material degrades drastically and plastic melting. The mixing ratio between wood and plastics has its best performance at ten to one woodplastics ratio. Internal bond strength decrease and high water expansion when the woodplastic ratio is lower and properties of MOR are weakened when it bees higher. Based on both of the maximum difference analysis ,the test shows the optimum conditions for wood plastics posites to be a hotpressing temperature of 190 ℃, a hotpressing time of 7 min and a woodplastic ratio of 10:3.Key words: Xylem fiber, Expandable Polystyrene , pound technology1 引言 木塑復(fù)合材料是當(dāng)前木材科學(xué)與技術(shù)研究中十分重要的研究方向。該材料以木材為基本體,以塑料為功能體,通過(guò)不同的復(fù)合途徑形成木塑復(fù)合材料。由于它綜合了木材與塑料兩種材料的性能特點(diǎn),因而具有非常廣泛的應(yīng)用前景。 木塑符合材料具有比單獨(dú)的木質(zhì)材料或塑料產(chǎn)品更優(yōu)異的性質(zhì),是木材的理想替代品,它的出現(xiàn)可以減少?gòu)U棄木材和塑料對(duì)城市環(huán)境的污染,也適應(yīng)現(xiàn)代材料復(fù)合化的發(fā)展規(guī)律。如何利用合適材質(zhì)的木材加工余物和合適的塑料作為基體來(lái)得到性能優(yōu)良的輕質(zhì)木塑復(fù)合材料成為
點(diǎn)擊復(fù)制文檔內(nèi)容
試題試卷相關(guān)推薦
文庫(kù)吧 www.dybbs8.com
公安備案圖鄂ICP備17016276號(hào)-1