The wealtherability of nylon 6 was increased with increasing amounts of antioxidants, UV absorber, UV crosslinker, stabilizer, and UVscreener. When the exposure time is 12hr and the content of the additives are 2.0 phr, the color difference change(ΔE) was decreased in the following order ; APR>TiO₂>UV CURE 4M/IRGANOX 1076(1:1) mixture>CHIMASSORB>Modified IRGANOX 1076>IRGANOX 1076/UV CURE 4M. The use of mixed additives of UV CURE 4M and IRGANOX 1076 increased the weatherability of nylon 6 when compared to the use of any one of the additives. It was observed that the weatherability improved when IRGANOX 1076 was coated with nylon 6 by equivolume % compared to the case when only IRGANOX 1076 was used. The weatherability of acrylated nylon 6 was better than for nylon 6. The blend of nylon 6 with poly(MAH-co-MMA) showed two-phase behavior over the entire blend concentrations. The blends of poly(MAH-co-MMA) with nylon 6, the E decreased with increasing poly(MAH-co-MMA) when the exposure time was 12hr. The tensile strength and elongation at break were decreased with increasing poly(MAH-co-MMA) concentrations in the blend of nylon 6 with poly(MAH-co-MMA). It was found that the crystalline structure of nylon 6 was a typical α-form crystalline structure even in the blends with poly(MAH-co-MMA). The relative degree of crystallinity of the blends was increasing content of poly(MAH-co-MMA).

Nylon 6의 내후성은 산화 방지제와 자회선 흡수제, 자외선 경화제, 안정제 등의 함량이 증가할수록 증가하였다. 2.0phr의 첨가제를 포함하는 nylon 6 필름을 313-280nm의 자외선을 12시간 조사 하였을 때 색차값(ΔE)은 다음과 같은 순서로 감소하였다. APR>TiO₂>UV CURE 4M/IRGANOX 1076(1:1) mixture>CHIMASSORB>Modified IRGANOX 1076>IRGANOX 1076/UV CURE 4M. IRGANOX 1076과 UV CURE 4M를 혼합한 것은 한 성분을 단독으로 사용할때 보다 내후성이 좋지 않았으며 IRGANOX 1076에 nylon 6를 코팅한 것은 IRGANOX 1076을 사용한 경우보다 내후성이 향상되었고 acetylate nylon 6은 nylon 6보다 내후성이 우수하였다. Nylon 6와 poly(MAH-co-MMA)의 블렌드는 전조성에 걸쳐 비상용계였다. Nylon 6와 ploy(MAH-co-MMA)의 블렌드에서 조사시간이 12시간일 때 색차값(ΔE)은 poly(MAH-co-MMA)의 농도가 증가함에 따라 감소하였고 내후성은 증가하였다. 인장강도와 파단신율은 poly(MAH-co-MMA)의 농도가 증가할수록 감소하였다. Nylon 6와 poly(MAH-co-MMA)의 블렌드물은 전형적인 형 구조를 나타내었으며 블렌드물의 상대결정도는 poly(MAH-co-MMA)의 농도가 증가함에 따라 감소하였다.

Keywords: nylon 6; weatherability; additives; color