Hygroscopic thickness swelling rate of composites from sawdust and recycled plastics

被引：0
作者：
Saeed Kazemi Najafi
Azadeh Kiaeifar
Mehdi Tajvidi
Elham Hamidinia
机构：
[1] Tarbiat Modares University,Department of Wood and Paper Science and Technology, Faculty of Natural Resources and Marine Sciences
[2] Tehran University,Department of Wood and Paper Science and Technology, Faculty of Natural Resources
来源：
Wood Science and Technology | 2008年 / 42卷
关键词：
Sawdust; HDPE; Thickness Swelling; Wood Plastic Composite; Recycle Plastic;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The thickness swelling rates of compression molded wood plastic composites (WPCs) prepared from 50% by weight sawdust and 50% by weight virgin and/or recycled plastics (HDPE and PP) were studied. Thickness swelling rates of the manufactured WPCs were evaluated by immersing them in water at room temperature and monitoring thickness changes for several weeks. A swelling model developed by Shi and Gardner (Composites Part A, 37:1276–1285, 2006) was used to study the thickness swelling process of WPCs. The parameter KSR of the model can be used to quantify the swelling rate. The results indicated that composites containing PP had lower equilibrium thickness swelling and also shorter equilibrium time (time to reach equilibrium thickness swelling). The swelling model developed was a good predictor of the hygroscopic swelling process of wood plastic composites. Composites containing PP (virgin and recycled) had higher KSR than those containing HDPE. The minimum and maximum KSR values were observed in composites made of virgin HDPE and a mixture of recycled plastics, respectively. With increasing recycled plastic content KSR linearly decreased.
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页码：161 / 168
页数：7
相关论文
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  • [1] Cooper PA(1996)Rate of swelling of vacuum-impregnated wood Wood Fiber Sci 28 28-38
  • [2] Ellis WD(1994)Moisture sorption and swelling of wood-polymer composites Wood Fiber Sci 26 333-341
  • [3] Espert A(2004)Comparison of water absorption in natural cellulosic fibers from wood and one-year crops in polypropylene composites and its influence on their mechanical properties Compos Part A 35 1267-1276
  • [4] Vilaplana F(2001)A review on interface modification and characterization of natural fiber reinforced plastic composites Polym Eng Sci 41 1471-1485
  • [5] Karlsson S(2007a)Effect of temperature, plastic type and virginity on the water uptake of sawdust/plastic composites Holz Roh- Werkst 65 377-382
  • [6] George J(2007)Water absorption behavior of composites from sawdust and recycled plastics J Reinf Comp 26 341-334
  • [7] Sreekala MS(1995)Swelling of wood. Part IV. A statistical model for prediction of maximum swelling of wood in organic liquids Wood Fiber Sci 27 22-24
  • [8] Thomas S(2001)Factors governing water absorption by composite matrices Compos Sci Tech 62 487-492
  • [9] Kazemi Najafi S(2004)Effect of hybridization and chemical modification on the water-absorption behavior of banana fiber-reinforced polyester composites J Appl Polym Sci 91 3856-3865
  • [10] Tajvidi M(2006)Hygroscopic thickness swelling rate of compression molded wood fiber and wood fiber/polymer composite Compos Part A 37 1276-1285
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