工程塑料应用
工程塑料應用
공정소료응용
ENGINEERING PLASTICS APPLICATION
2015年
3期
13-18
,共6页
赵丽梅%何春霞%朱方政%丁建生%卢圣楼
趙麗梅%何春霞%硃方政%丁建生%盧聖樓
조려매%하춘하%주방정%정건생%로골루
木塑复合材料%木质纤维填料%高密度聚乙烯%热性能
木塑複閤材料%木質纖維填料%高密度聚乙烯%熱性能
목소복합재료%목질섬유전료%고밀도취을희%열성능
wood plastic composite%wood fiber filler%PE-HD%thermal properties
分别以木粉、竹粉、稻壳粉三种木质纤维为填料，高密度聚乙烯(PE–HD)为基体，采用模压成型法制备木塑复合材料，对复合材料的热膨胀性能和热失重特性进行了研究。结果表明，三种木质纤维填充PE–HD复合材料的线性热膨胀系数顺序为：PE–HD／木粉复合材料<PE–HD／竹粉复合材料<PE–HD／稻壳粉复合材料；PE–HD／木粉复合材料的线性热膨胀系数随着木粉含量的增加和木粉粒径的减小而减小，木粉质量分数为65%、粒径为150μm时，复合材料的线性热膨胀系数最小。PE–HD基木塑复合材料的热分解过程分为两个阶段，第一阶段主要为木质纤维分解阶段，第二阶段主要是PE–HD分解阶段；PE–HD／木粉复合材料起始失重温度高于竹粉和稻壳粉填充的复合材料；且PE–HD／木粉复合材料中木粉含量越高，第一阶段分解速率及失重量越大；木粉粒径越小，复合材料起始分解温度越低。
分彆以木粉、竹粉、稻殼粉三種木質纖維為填料，高密度聚乙烯(PE–HD)為基體，採用模壓成型法製備木塑複閤材料，對複閤材料的熱膨脹性能和熱失重特性進行瞭研究。結果錶明，三種木質纖維填充PE–HD複閤材料的線性熱膨脹繫數順序為：PE–HD／木粉複閤材料<PE–HD／竹粉複閤材料<PE–HD／稻殼粉複閤材料；PE–HD／木粉複閤材料的線性熱膨脹繫數隨著木粉含量的增加和木粉粒徑的減小而減小，木粉質量分數為65%、粒徑為150μm時，複閤材料的線性熱膨脹繫數最小。PE–HD基木塑複閤材料的熱分解過程分為兩箇階段，第一階段主要為木質纖維分解階段，第二階段主要是PE–HD分解階段；PE–HD／木粉複閤材料起始失重溫度高于竹粉和稻殼粉填充的複閤材料；且PE–HD／木粉複閤材料中木粉含量越高，第一階段分解速率及失重量越大；木粉粒徑越小，複閤材料起始分解溫度越低。
분별이목분、죽분、도각분삼충목질섬유위전료，고밀도취을희(PE–HD)위기체，채용모압성형법제비목소복합재료，대복합재료적열팽창성능화열실중특성진행료연구。결과표명，삼충목질섬유전충PE–HD복합재료적선성열팽창계수순서위：PE–HD／목분복합재료<PE–HD／죽분복합재료<PE–HD／도각분복합재료；PE–HD／목분복합재료적선성열팽창계수수착목분함량적증가화목분립경적감소이감소，목분질량분수위65%、립경위150μm시，복합재료적선성열팽창계수최소。PE–HD기목소복합재료적열분해과정분위량개계단，제일계단주요위목질섬유분해계단，제이계단주요시PE–HD분해계단；PE–HD／목분복합재료기시실중온도고우죽분화도각분전충적복합재료；차PE–HD／목분복합재료중목분함량월고，제일계단분해속솔급실중량월대；목분립경월소，복합재료기시분해온도월저。
The PE–HD wood plastic composite were prepared filled with wood flour,bamboo flour,rice husk flour and some assistants by compression molding process. The thermal expansion and decomposition properties of the composites were tested. The results show that the ascending order of the coefficient of linear thermal expansion of PE–HD composites filled with wood fiber fillers is the following:PE–HD/wood flour composite<PE–HD/bamboo flour composite<PE–HD/rice husk flour composite. The coefficient of linear thermal expansion of PE–HD/wood flour composite decreases with the increase of wood content and mesh,with 65% and 150 μm wood fiber,the coefficient of linear thermal expansion of PE–HD/wood flour composite is the minimum. The thermal decomposition of PE–HD/wood filler composites are carried out in two steps,the first step is mainly the decomposition of wood fillers,and the second step is mainly the decomposition of PE–HD. The weightlessness starting temperature of PE–HD/wood flour composite is higher than that of PE–HD/bamboo flour composite and PE–HD/rice husk flour composite,and with higher wood content,the decomposition rate and weight loss of the first step of PE–HD/wood flour composites become more greater. The smaller the particle size,the lower the initial decomposition temperature.
