南京林业大学学报（自然科学版）Issue(4)：127-131,5.DOI:10.3969/j.issn.1000-2006.2015.04.022
纤维素基脲醛树脂模塑料改性研究
Modification research of cellulose based urea-formaldehyde resin molding compound
摘要
Abstract
The effects of modifiers polyvinyl butyral, polyacrylate and polystyrene on size stability, mechanical properties and thermal stability of moulding compound were investigated, and the dynamic mechanical properties and mi⁃crostructure of fracture surface of modified systems were studied with dynamic mechanical analysis ( DMA) and scanning electron microscope ( SEM) . The results showed that moulding plastic had the best dimension stability when polyvinyl butyral, polyacrylate and polystyrene were added 20%, 20% and 10%, respectively. The impact strength and bending strength of urea⁃formaldehyde resin molding plastic modified with 20% polyvinyl butyral were 2.55 kJ/m2 and 88.3 MPa respectively, and increased by 49.1% and 63.2% comparing with unmodified compound. Polyacrylate could improve the low temperature resistance of molding compound, and moulding compound modified with polyvinyl butyral had good high⁃temperature performance;The DMA test results showed that polyvinyl butyral and polyacrylate had the toughening effects on the moulding compound, and the compatibility with urea⁃formaldehyde resin was better. The moulding compound modi⁃fied with polystyrene could not be toughened. In addition, fracture surface of moulding compound modified with polyvinyl butyral and polyacrylate appeared gliding fracture and the compound modified with polystyrene appeared brittle fracture.关键词
纤维素基脲醛树脂/改性剂/力学性能/热稳定性Key words
cellulose based urea-formaldehyde resin/modifier/mechanical properties/thermal stability分类
化学化工引用本文复制引用
刘娟,南静娅,王春鹏,储富祥,陈日清..纤维素基脲醛树脂模塑料改性研究[J].南京林业大学学报（自然科学版）,2015,(4):127-131,5.基金项目
中央级公益性科研院所基本科研业务费专项资金项目 （）
