Color Change and Tensile Properties of Wood Flour Reinforced Polypropylene Composites; Influence of Photostabilizers

• 발행기관: 한국응용과학기술학회 (구.한국유화학회)
• 저자명: Sun Young Lee
• 간행물 정보: 『한국응용과학기술학회지』한국유화학회지 제26권 제2호, 171~178쪽, 전체 8쪽
• 주제분류: 공학 > 화학공학
• 파일형태: PDF
• 발행일자: 2008.06.30

영문 초록

A comparative analysis of the hindered amine light stabilizers (HALS) and UV abosrber (UVA) and their respective photostabilizing effect on wood plastic composites (WPCs) are reported in this study. The influence of accelerated weathering on the mechanical properties of the composites and the microscopic morphology of a degraded layer on the cross section and the surface were studied. UV absorbers were more efficient at preventing composite lightening than was UV stabilizer. The amount of whitening decreased with the increase of photostabilizers. With the addition of a UV absorber (Tinuvin360), the tensile modulus and strength of the composites increased slightly. However, the addition of a light stabilizer (Tinuvin770) and a UV absorber decreased the tensile modulus and strength of the composites. After 250 and 500 hr exposure, tensile modulus and strength of the un stabilized and stabilized composites decreased. The tensile strength of UV absorber (Chimassorb81)-stabilized composites was significantly greater than that of control and light stabilizer (Tinuvin770)- and UV absorber (Tinuvin360)-stabilized composites. UV absorber-stabilized samples showed less whitening and photodegradation than control and light stabilizer-stabilized samples.

목차

Abstract

1. Introduction

2. Experimental

3. Results and discussion

4. Conclusions

References

키워드

PP wood flour light stabilizer UV absorber weathering