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首页> 外文期刊>Journal of Applied Polymer Science >Urea formaldehyde resin with low formaldehyde content modified by phenol formaldehyde intermediates and properties of its bamboo particleboards
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Urea formaldehyde resin with low formaldehyde content modified by phenol formaldehyde intermediates and properties of its bamboo particleboards

机译：酚醛中间体改性的低甲醛脲醛树脂及其竹刨花板的性能

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摘要

Phenol formaldehyde reaction solution (PFS) was used to synthesize urea-formaldehyde resins (PFSUF resins) with low formaldehyde content. In addition, the prepared PFSUF resins were used as adhesives to bond bamboo particleboards. Mechanical properties, fracture morphology, water absorption ratio, and dimensional stability of bamboo particleboards have been studied by tensile tests, SEM tests, water absorption analysis, and swelling ratio analysis, respectively. The results demonstrate that the main ingredient of PFS is phenol formaldehyde intermediate 2,4,6-trimethylolphenate and proper amount of PFS can be used to reduce the formaldehyde content of UF resins effectively. The results also show that bamboo particleboards bonded with PFSUF resins exhibit better mechanical properties, water resistance, and dimensional stability than that bonded with pure UF resin. However, the results of TG and mechanical properties analysis exhibit that alternative curing agents to ammonium chloride should be studied to improve the curing properties of the PFSUF resins with low formaldehyde content. Taken together, this work provides a method of preparing environment-friendly PFSUF resins with low phenol and low formaldehyde content and the prepared resins have potential application in wood industry. (c) 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42280.
机译：苯酚甲醛反应溶液（PFS）用于合成甲醛含量低的脲醛树脂（PFSUF树脂）。此外，将制备的PFSUF树脂用作粘合剂来粘合竹刨花板。通过拉伸试验，SEM试验，吸水率分析和溶胀率分析分别研究了竹刨花板的力学性能，断裂形态，吸水率和尺寸稳定性。结果表明，PFS的主要成分是酚醛中间体2,4,6-三羟甲基苯酚，适量的PFS可有效降低UF树脂的甲醛含量。结果还表明，与PFSUF树脂粘合的竹刨花板比纯UF树脂粘合的竹刨花板具有更好的机械性能，耐水性和尺寸稳定性。然而，TG和机械性能分析的结果表明，应研究替代氯化铵的固化剂，以改善低甲醛含量的PFSFF树脂的固化性能。综上所述，这项工作提供了一种制备具有低酚和低甲醛含量的环保型PFSUF树脂的方法，并且所制备的树脂在木材工业中具有潜在的应用前景。 （c）2015 Wiley Periodicals，Inc. J. Appl。 Polym。科学2015，132，42280。

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