当前位置: X-MOL 学术Polym. Degrad. Stabil. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Thermal behaviour and fungi resistance of composites based on wood and natural and synthetic epoxy resins cured with maleopimaric acid
Polymer Degradation and Stability ( IF 6.3 ) Pub Date : 2018-12-21 , DOI: 10.1016/j.polymdegradstab.2018.12.022
Liliana Rosu , Fanica Mustata , Cristian–Dragos Varganici , Dan Rosu , Teodora Rusu , Irina Rosca

Wood/epoxy resin composites based on diglycidyl ether of bisphenol A (DGEBA)/epoxidized oil (EO)/Diels–Alder adducts of resin acids with maleic anhydride (RAMA) in acetone (80%) were obtained by impregnation. Epoxidation was carried out in the presence of hydrogen peroxide (H2O2), acetic acid (AAc), sulfuric acid (H2SO4) as catalyst and cyclohexane (CHx) as solvent at a molar ratio of 0.5/1.5/1 (AAc/hydrogen peroxide/ethylene unsaturation). The kinetic parameters (activation energy and pre–exponential factor) of the DGEBA/EO/RAMA curing reaction and thermal characterization of the crosslinked compounds and wood epoxy composites (WECs) were obtained using differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Based on the chemical structure of the evolved gases resulted during thermal decomposition of the crosslinked polymers and WECs, identified with FT–IR, a probable mechanism of thermal degradation was proposed. Resistance to three fungi was also tested.



中文翻译:

木材与马来海马酸固化的天然和合成环氧树脂的复合材料的热性能和抗真菌性

通过双酚A(DGEBA)/环氧油(EO)/ Diels-树脂酸与马来酸酐(RAMA)在丙酮中(80%)的Diels-Alder加成物形成的木材/环氧树脂复合材料。在过氧化氢(H 2 O 2),乙酸(AAc),硫酸(H 2 SO 4)存在下进行环氧化)作为催化剂,环己烷(CHx)作为溶剂,摩尔比为0.5 / 1.5 / 1(AAc /过氧化氢/乙烯不饱和键)。使用差示扫描量热法(DSC)和热重分析(TGA)获得了DGEBA / EO / RAMA固化反应的动力学参数(活化能和指数前因子)以及交联化合物和木质环氧复合材料(WEC)的热特性。 。基于交联聚合物和WECs热分解过程中产生的逸出气体的化学结构,并用FT-IR进行了鉴定,提出了一种可能的热降解机理。还测试了对三种真菌的抗性。

更新日期:2018-12-21
down
wechat
bug