Interfacial adsorption and crystallization of polycarbonate in carbon fiber composites
Interfacial adsorption and crystallization of polycarbonate in carbon fiber composites
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DOI：
10.1002/app.1990.070390905
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发表时间：
1990-05
影响因子：
3
通讯作者：
R. Brady;R. Porter
中科院分区：
文献类型：
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作者：
R. Brady;R. Porter
通过改变退火时间和温度，对聚碳酸酯（PC）/碳纤维（CF）复合材料系统的界面吸附和结晶进行了检查。已研究了长达 180 分钟的时间和 245、275 和 300°C 的温度。单向连续纤维复合材料的横向拉伸、横向韧性和扫描电子显微镜结果表明，在较长时间和较高退火温度下，纤维/基体粘合力得到改善。横向韧性和横向拉伸强度提高了两倍。数据表明，主要是吸附而不是二次界面结晶是增加粘附力的可能机制。已发现等温横向韧性值非常适合 Langmuir 型表达式。通过横向韧性测量的吸附温度依赖性可以通过阿伦尼乌斯方程很好地描述。发现横向韧性对 PC 分子量（Mw = 26,600 至 39,800）的依赖性很大，分子量越高，吸附越有效。
A polycarbonate (PC)/carbon fiber (CF) composite system has been examined with regard to interfacial adsorption and crystallization by altering times and temperatures of annealing. Times up to 180 min and temperatures of 245, 275, and 300°C have been investigated. Tranverse tensile, tranverse toughness, and scanning electron microscopy results on unidirectional, continuous-fiber composites indicate improved fiber/matrix adhesion at longer times and higher temperatures of annealing. Improvements in transverse toughness and transverse tensile strength of a factor of two is achieved. The data indicate that primarily adsorption rather than secondary interfacial crystallization is the likely mechanism for increased adhension. Isothermal transverse toughness values have been found to fit well to a Langmuir-type expression. The temperature dependence of adsorption as measured by transverse toughness is described well by an Arrhenius equation. The dependence of transverse toughness on PC molecular weights from Mw = 26,600 to 39,800 was found to be large, with higher molecular weights adsorbing more effectively.