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首页> 外文期刊>Journal of Applied Polymer Science >Photoinitiated grafting of methyl methacrylate on highly oriented polyethylene: Effect of draw ratio on grafting
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Photoinitiated grafting of methyl methacrylate on highly oriented polyethylene: Effect of draw ratio on grafting

机译：甲基丙烯酸甲酯在高取向聚乙烯上的光引发接枝：拉伸比对接枝的影响

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摘要

Modification of highly oriented polyethylene was performed using a photoinitiated grafting technique. The samples were first coated with photoinitiator and then exposed to methyl methacrylate vapor under UV light (lambda > 290 nm) at 60 degrees C. The extent of grafting was studied as a function of draw ratio. It was found that the extent of grafting decreased significantly as the draw ratio was increased. Control samples of undrawn samples with different thermal histories suggested that there was another factor in addition to crystallinity that influences the extent of grafting. It is proposed that amorphous orientation or taut-tie molecules reduce the photoinitiation process. Gravimetric and attenuated total reflectance-IR measurements indicated that the grafting reaction can occur below the sample surface (or internal grafting) and that the proportion of surface grafting increases with increasing draw ratio. (C) 1998 John Wiley & Sons, Inc. [References: 39]
机译：高取向聚乙烯的改性是使用光引发接枝技术进行的。样品首先用光引发剂涂覆，然后在60°C的紫外线（λ> 290 nm）下暴露于甲基丙烯酸甲酯蒸汽中。研究了接枝程度与拉伸比的关系。已经发现，随着拉伸比的增加，接枝程度显着降低。具有不同热历史的未拉伸样品的对照样品表明，除了结晶度以外，还有另一个因素会影响接枝程度。提出无定形取向或拉紧的分子减少了光引发过程。重量和衰减全反射-IR测量表明，接枝反应可在样品表面以下发生（或内部接枝），并且表面接枝的比例随拉伸比的增加而增加。 （C）1998 John Wiley＆Sons，Inc. [参考：39]

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