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供职机构:东北林业大学更多>>
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Rheological and mechanical properties of wood fiber-PP/PE blend composites被引量:9
2008年
For evaluation of the rheological and mechanical properties of highly filled wood plastic composites (WPCs), polypropylene/polyethylene (PP/PE) blends were grafted with maleic anhydride (MAH) to enhance the interfacial adhesion between wood fiber and matrix. WPCs were prepared from wood fiber up to 60 wt.% and modified PP/PE was blended by extrusion. The rheological properties were studied by using dynamic measurement. According to the strain sweep test, the linear viscoelastic region of composites in the melt was determined. The result showed that the storage modulus was independent of the strain at low strain region (〈0.1%). The frequency sweep resuits indicated that all composites exhibited shear thinning behavior, and both the storage modulus and complex viscosity of MAH modified composites were decreased comparing to those unmodified. Flexural properties and impact strength of the prepared WPCs were measured according to the relevant standard specifications. The flexural and impact strength of the manufactured composites significantly increased and reached a maximum when MAH dosage was 1.0 wt%, whereas the flexural modulus after an initial decreased, also increased with MAH dosage. The increase in mechanical properties indicated that the presence of anhydride groups enhanced the interracial adhesion between wood fiber and PP/PE blends.
高华宋永明王清文韩振张明丽
关键词:COMPOSITES
马来酸酐接枝PP/PE共混物及其木塑复合材料的研究
利用马来酸酐(MAH)对PP/PE混合物进行接枝改性,然后以接枝共混物作为基体与木纤维复合制备木塑复合材料。红外光谱图分析证明MAH已成功接枝在PP/PE共混物上。力学测试结果显示,基体经过接枝改性后,复合材料的弯曲强度...
高华王清文宋永明王海刚
关键词:马来酸酐接枝改性木塑复合材料力学测试
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马来酸酐接枝聚烯烃共混物-木纤维复合材料的研究
本文利用聚丙烯(PP)和聚乙烯(PE)新料混合,然后通过反应挤出对其进行马来酸酐(MAH)接枝改性,并以接枝共混物为基体与木纤维复合制备木塑复合材料。力学测试结果表明,当MAH用量为1%时,复合材料弯曲强度提高了50.4...
高华王清文
关键词:木塑复合材料接枝改性马来酸酐
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阻燃型木塑复合材料及其制备方法
阻燃型木塑复合材料及其制备方法,它涉及一种木塑复合材料及其制备方法。本发明解决了现有的阻燃型木塑复合材料中采用的含卤阻燃剂烟雾大、聚磷酸铵为阻燃剂主体不适合成型加工温度要求高的木塑复合材料的制备及制备得到的木塑复合材料力...
王清文房轶群高华隋淑娟王海刚宋永明
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木粉/马来酸酐接枝聚烯共混物复合材料
木塑复合材料是由木质纤维材料与热塑性塑料熔融复合形成的一类高性能、高附加值的新型环保材料,它的广泛应用为废旧塑料和木质纤维资源的高效利用提供了一条重要途径。然而,废旧塑料往往是由性质各异的几种非极性聚合物组成的混合物,塑...
高华
关键词:木塑复合材料马来酸酐木粉
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Effects of two modification methods on the mechanical properties of wood flour/recycled plastic blends composites: addition of thermoplastic elastomer SEBS-g-MAH and in-situ grafting MAH被引量:2
2010年
The effect of maleic anhydride grafted styrene-ethylene- buty-lene-styrene block copolymer (SEBS-g-MAH) and in-situ grafting MAH on mechanical, dynamic mechanical properties of wood flour/recycled plastic blends composites was investigated. Recycled plastic polypro-pylene (PP), high-density polyethylene (HDPE) and polystyrene (PS), were mixed with wood flour in a high speed blender and then extruded by a twin/single screw tandem extruder system to form wood flour/recycled plastic blends composites. Results show that the impact properties of the composites were improved more significantly by using SEBS-g-MAH compatibilizer than by using the mixtures of MAH and DCP via reactive blending in situ. However, contrary results were ob-served on the tensile and flexural properties of the corresponding com-posites. In General, the mechanical properties of composites made from recycled plastic blends were inferior to those made from virgin plastic blends, especially in elongation break. The morphological study verified that the interfacial adhesion or the compatibility of plastic blends with wood flour was improved by adding SEBS-g-MAH or in-situ grafting MAH. A better interfacial bonding between PP, HDPE, PS and wood flour was obtained by in-situ grafting MAH than the addition of SEBS-g-MAH. In-situ grafting MAH can be considered as a potential way of increasing the interfacial compatibility between plastic blends and wood flour. The storage modulus and damping factor of composites were also characterized through dynamic mechanical analysis (DMA).
宋永明王清文韩广平王海刚高华
关键词:COMPATIBILIZERCOMPOSITES
阻燃型木塑复合材料及其制备方法
阻燃型木塑复合材料及其制备方法,它涉及一种木塑复合材料及其制备方法。本发明解决了现有的阻燃型木塑复合材料中采用的含卤阻燃剂烟雾大、聚磷酸铵为阻燃剂主体不适合成型加工温度要求高的木塑复合材料的制备及制备得到的木塑复合材料力...
王清文房轶群高华隋淑娟王海刚宋永明
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利用木材加工剩余物和废旧塑料制造高性能木塑复合材料
木塑复合材料是一类符合发展循环经济要求的环保型木材保护新产品。本文以杨木单板生产工程中产生的碎料为原料制备木纤堆;利用聚丙烯(PP)和聚乙烯(PE)新料混合模拟混合废旧塑料,通过反应挤出对其进行马来酸酐(MAH)接枝改性...
高华王清文隋淑娟王海刚李坚
关键词:马来酸酐木塑复合材料
用废旧塑料混合物制备的木塑复合材料及其制备方法
用废旧塑料混合物制备的木塑复合材料及其制备方法,它涉及一种木塑复合材料及其制备方法。它解决了目前用废旧塑料混合物制备的木塑复合材料力学性能差等问题。木塑复合材料由木质纤维材料、改性废旧塑料共混物和润滑剂制成。制备方法:制...
王清文高华王海刚宋永明隋淑娟王伟宏许民
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利用马来酸酐接枝聚烯烃共混物和木纤维制备高性能木塑复合材料
本文利用聚丙烯(PP)和聚乙烯(PE)新料混合模拟混合废旧塑料,然后通过反应挤出对其进行马来酸酐(MAH)接枝改性,并以接枝共混物为基体与木纤维复合制备木塑复合材料。通过对比接枝PP/PE共混物和未接枝共混物的红外谱图,...
高华王清文王伟宏王海刚宋永明
关键词:马来酸酐接枝木纤维木塑复合材料流变性能
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