Effect of UV Exposure on Mechanical Properties of POSS Reinforced Epoxy Nanocomposites

被引：1
|
作者：
Hamim, Salah U. [1 ]
Mishra, Kunal [1 ]
Singh, Raman P. [1 ]
机构：
[1] Oklahoma State Univ, Sch Mech & Aerosp Engn, Stillwater, OK 74075 USA
来源：
CHALLENGES IN MECHANICS OF TIME-DEPENDENT MATERIALS, VOL 2 | 2015年
关键词：
Glycidyl POSS; Nanocomposite; UV exposure; Elastic modulus; Creep compliance; SENSING INDENTATION; PHOTODEGRADATION;
D O I：
10.1007/978-3-319-06980-7_18
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
Epoxy nanocomposites containing 5 wt% glycidyl Polyhedral Oligomeric Silsesquioxane (POSS) by weight is prepared. Elastic and viscoelastic properties of the neat epoxy and epoxy/POSS nanocomposite has been studied using nanoindentation technique. Elastic modulus of the polymer systems are determined using modified Oliver-Pharr method taking creep rate into account. Creep compliance properties of the studied systems are determined by fitting a standard linear solid model to the creep plot. Both neat epoxy and epoxy/POSS nanocomposite showed an increase in elastic modulus and a decrease in creep compliance as a function of UV exposure time; although, the effect of UV exposure is more pronounced in case of epoxy/POSS nanocomposite. It is speculated that the excess epoxide groups present in the glycidyl POSS is going through further crosslinking during the UV exposure leading to the observed higher rate of property change compared to neat epoxy.
引用
收藏
页码：147 / 152
页数：6
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