中国塑料 ›› 2013, Vol. 27 ›› Issue (12): 17-22 .DOI: 10.19491/j.issn.1001-9278.2013.12.004

• 材料与性能 • 上一篇    下一篇

LED封装用超支化聚酯改性环氧树脂的研究

曾庆鹏 容腾 容敏智 章明秋   

  1. 广东省潮州市质量计量监督检测所 广州市质量监督检测研究院 聚合物复合材料及功能材料教育部重点实验室,中山大学材料科学研究所 中山大学材料科学研究所
  • 收稿日期:2013-08-05 修回日期:2013-09-29 出版日期:2013-08-26 发布日期:2013-08-26

Epoxy Resin Modified with Hyperbranched Polyesters as LED Packaging Materials

Qing-peng ZENG Rong Min-Zhi   

  • Received:2013-08-05 Revised:2013-09-29 Online:2013-08-26 Published:2013-08-26
  • Contact: Rong Min-Zhi

摘要: 采用不同相对分子质量的含端羟基超支化聚酯(H20、H30)以及端羧基改性超支化聚酯(H20-COOH)增韧邻甲酚醛环氧树脂,并考察了其含量对环氧树脂透光性、耐热性等的影响。结果表明,这3种超支化聚酯的加入均能提高环氧树脂的冲击强度和弯曲强度,并且基本不降低材料的弯曲模量;其中,加入2.5份H30的环氧树脂的冲击强度提高了90 %,而H20-COOH含量为2.5份时材料的弯曲强度提高了约60 %;此外,各种超支化聚酯的加入均可以保持材料的玻璃化转变温度,并可提高材料的初始分解温度;3种超支化聚酯的加入对材料的透光性能均影响不大,而采用H20-COOH改性环氧树脂还可以降低材料的吸水率。

关键词: 环氧树脂, 超支化聚酯, 增韧, 透光性, 耐热性

Abstract: Hydroxyl-terminated hyperbranched polyester H20 and H30 with different molecular weights, as well as carboxyl-terminated hyperbranched polyester H20-COOH were used for the toughening of o-cresol formaldehyde epoxy resin. It was found that all the hyperbranched polyesters could improve impact toughness and flexural strengths, and remain flexural modulus of the epoxy resin. The addition of 2.5phr H30 could bring about 90 % increase of impact strength, while flexural strength of epoxy resin could be raised by 60 % with 2.5phr incorporation of H20-COOH. In addition, various hyperbranched polyesters could increase the initial decomposition temperature of the material. There were no evident influences of hyperbranched polyesters on the light transmission of the epoxy resin. With increasing H20-COOH content the water absorption of the epoxy resin decreased.

Key words: epoxy resin, hyperbranched polyester, toughness, light transmission, heat resistance