eva封装材料改性研究.rar

合格作品 字数19827个字
摘 要
太阳能电池组件中的核心部分硅电池本身寿命己具有30年以上的使用寿命，然而对电池片起到固定、密封和保护作用的透明高分子封装胶在室外天候环境中会很快老化变黄，从而导致整个电池组件的光电转化效率下降。封装材料的使用寿命就限制了整个电池组件的寿 命。因此，研制自然气候条件下，光、电和力学性能稳定可靠、使用期长的透明高分子封装材料是提高太阳电池组件寿命，降低太阳能发电成本的关键。
本试验中，EVA胶膜的热氧老化试验在90℃下进行，选用含33％VA的EVA做基本原料，通过熔融共混挤出的方法加入抗氧剂、增塑剂、交联剂和增粘剂，再经过热压，得到太阳能电池封装用EVA封装材料。研究了不同改性剂对EVA封装材料软化点、拉伸强度、透光率和抗老化性的影响。结果表明，在EVA与松香的比例为5:3的条件下,选用适宜的交联剂，抗氧化剂，增塑剂能够使EVA胶膜在低温短时间条件下进行封装固化，拉伸强度、透光率和抗老化性都能达到进口EVA的标准,并且在此条件下固化的EVA封装材料具有很好的热稳定性。本工作所制备的改性EVA封装材料的热稳定性明显优于国产EVA，接近进口封装材料的性能指标。
关键词 EVA 改性剂 软化点 透光率
Abstract
Environmental pollution and energy shortage is human in the 21 st century one of the biggest challenges facing. Use of solar cell module will be clean, renewable sunlight into electricity is solve these two problems of the most effective ways to. Solar cell module central part of silicon itself with 30 years of life has the service life of the battery, but of a fixed, sealing and protect the role of the polymer transparent packaging the rubber in the outdoor environment will soon aging weather become yellow, leading to the whole cell module photoelectric conversion efficiency descend. The results, the service life of plastic packaging limits the battery life of the components. Therefore, the development of natural weather conditions, light, electric and mechanical performance is stable and reliable, life long transparent polymer packaging materials is to improve the solar cell module life, reducing the cost of solar power of the key.
This test is to contain 33% of the VA basic raw materials, through EVA do molten blending extrusion method of adding antioxidants, plasticizer, crosslinking agent and viscous agent, and by hot pressing, get the solar cell encapsulation with EVA film. The research in different modifier to EVA film softening point, tensile strength, light transmittance and the influence of the anti-aging sex. The results show that, in EVA and the proportion of rosin for "conditions, choose appropriate crosslinking agent, antioxidants, crosslinking agent, plasticizer can make EVA film in the low temperature under the condition of short time encapsulate curing, tensile strength, light transmittance and anti-aging sex can meet all the standards, and imported EVA in the conditions of curing the film has better heat EVA oxygen stability. This work by the system modification of the thermal stability of the film EVA oxygen is superior, and close to the domestic products imported products.
Key words EVA modifier softening point light transmittance
目 录
摘 要 1
Abstract 2
第1章 绪论 4
1.1 本课题研究的目的和意义 4
1.2 EVA封装材料研究现状 5
1.3 助剂对EVA性能的影响 9
1.3.1 增粘剂 9
1.3.2 交联剂 10
1.3.3 黏度调节剂 10
1.3.4 抗氧剂 10
1.4 研究内容及方法 10
1.4.1 EVA主体成分配比的确定 10
1.4.2 改性剂的选择 11
1.4.3 研究方法 11
第2章 实验部分 11
2.1 实验试剂与仪器设备 11
2.1.1 主要原料及试剂 11
2.1.2 主要仪器设备 12
2.2 改性EVA的制备 13
2.2.1 EVA封装材料制备步骤 13
2.2.2 不同配比EVA的制备 13
2.2.3 改性EVA封装材料的制备 14
2.3 改性EVA的性能检测 14
2.3.1 软化点的测定 14
2.3.2 透过率的测定 14
2.3.3 抗老化性的测定 14
2.3.4 拉伸强度的测定 14
第三章 结果与讨论 15
3.1 通过软化点的测定确定松香、石蜡和EVA的配比 15
3.1.1 EVA的含量对软化点的影响 15
3.1.2 松香的含量对软化点的影响 16
3.1.3 石蜡的含量对软化点的影响 16
3.2 改性剂的选择 18
3.2.1 软化点的测定 18
3.2.2 透光率的测定 19
3.2.3 抗老化性的测定 21
3.2.4 拉伸强度的测定 22
结 论 24
致 谢 25
参考文献 26
DIRECTORY
Abstract 1
Abstract 2
Chapter 1 Introduction 4
1.1 The purpose and significance of the research 4
1.2 EVA packaging materials Research 5
1.3 EVA performance additives for 9
1.3.1 Tackifier 9
1.3.2 Crosslinker 10
1.3.3 Viscosity modifier 10
1.3.4 Antioxidants 10
1.4 Research contents and methods 10
1.4.1 EVA to determine the main chemical composition of 10
1.4.2 The choice of modifier 11
1.4.3 Research Methods 11
Chapter 2 Experimental 11
2.1 Reagents and equipment 11
2.1.1 The main raw materials and reagents 11
2.1.2 Main equipment 12
2.2 Preparation of modified EVA 13
2.2.1 EVA packaging materials preparation steps 13
2.2.2 Preparation of 13 different combinations of EVA 13
2.2.3 Preparation of modified EVA packaging materials 14
2.3 Performance testing of modified EVA 14
2.3.1..