Influence of ultraviolet absorbers on weather resistance of PBST film

doi:10.19491/j.issn.1001-9278.2022.05.018

Abstract

Abstract:

The natural aging behavior of poly（butylene succinate?butylene terephthalate）（PBST） films in Turpan and Hainan was studied， and their tensile， optical， and thermal properties before and after aging were investigated using a high?speed tensile tester， an enhanced projection haze tester， and a differential scanning calorimeter. The effect of UV absorber UVA on the weather resistance of PBST films were evaluated. The results indicated that the tensile strength and elongation at break of the PBST films gradually decreased with an increase in natural aging time， but the light transmittance seemed not to change significantly. Moreover， the haze of the films gradually increased， and their melting peak temperature shifted to a lower temperature. The UV absorber could significantly improve the weather resistance of PBST at an optimal addition amount of 0.5 wt%.

Key words: poly （butylene succinate?co?butylene terephthalate）, mulching film, weather resistance, natural weathering

CLC Number:

TQ314.257

ZHANG Zongyin, LYU Mingfu, GUO Peng, XU Yaohui, ZHANG Shijun. Influence of ultraviolet absorbers on weather resistance of PBST film[J]. China Plastics, 2022, 36(5): 110-115.

Figures/Tables 5

References 25

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老化时间/d	UVA 添加量/%	拉伸强度/MPa		断裂伸长率/%
老化时间/d	UVA 添加量/%	MD	TD	MD	TD
0	0	22.2±1.4	12.0±1.5	97.5±15.4	250.0±27.3
	0.1	24.3±1.7	11.1±1.2	79.7±6.5	292.9±24.9
	0.5	19.0±1.5	10.2±0.6	129.9±8.2	284.5±23.5
	1.0	25.2±1.5	11.3±1.1	78.4±8.7	266.0±10.4
30	0	9.8±0.9	8.0±0.7	22.0±7.5	6.4±0.5
	0.1	11.9±0.6	9.3±0.8	27.4±2.7	11.9±2.3
	0.5	11.3±0.2	8.9±0.5	36.0±4.3	18.5±1.9
	1.0	12.4±0.9	9.4±0.3	33.8±10.9	18.2±3.4
60	0	7.6±1.6	12.3±1.0	6.3±2.5	7.9±1.2
	0.1	12.7±0.9	12.7±1.0	17.9±2.3	7.3±1.1
	0.5	13.9±0.6	12.0±0.8	23.7±1.5	14.3±3.8
	1.0	13.0±0.7	13.0±1.9	21.4±3.1	12.7±1.9

老化时间/d	UVA 添加量/%	拉伸强度/MPa		断裂伸长率/%
老化时间/d	UVA 添加量/%	MD	TD	MD	TD
0	0	22.2±1.4	12.0±1.5	97.5±15.4	250.0±27.3
	0.1	24.3±1.7	11.1±1.2	79.7±6.5	292.9±24.9
	0.5	19.0±1.5	10.2±0.6	129.9±8.2	284.5±23.5
	1.0	25.2±1.5	11.3±1.1	78.4±8.7	266.0±10.4
30	0	9.8±0.9	8.0±0.7	22.0±7.5	6.4±0.5
	0.1	11.9±0.6	9.3±0.8	27.4±2.7	11.9±2.3
	0.5	11.3±0.2	8.9±0.5	36.0±4.3	18.5±1.9
	1.0	12.4±0.9	9.4±0.3	33.8±10.9	18.2±3.4
60	0	7.6±1.6	12.3±1.0	6.3±2.5	7.9±1.2
	0.1	12.7±0.9	12.7±1.0	17.9±2.3	7.3±1.1
	0.5	13.9±0.6	12.0±0.8	23.7±1.5	14.3±3.8
	1.0	13.0±0.7	13.0±1.9	21.4±3.1	12.7±1.9

老化时间/d	UVA 添加量/%	拉伸强度/MPa		断裂伸长率/%
老化时间/d	UVA 添加量/%	MD	TD	MD	TD
0	0	22.2±1.4	12.0±1.5	97.5±15.4	250.0±27.3
	0.1	24.3±1.7	11.1±1.2	79.7±6.5	292.9±24.9
	0.5	19.0±1.5	10.2±0.6	129.9±8.2	284.5±23.5
	1.0	25.2±1.5	11.3±1.1	78.4±8.7	266.0±10.4
30	0	9.4±1.8	4.5±0.9	20.6±4.5	5.2±0.8
	0.1	10.5±0.8	6.8±1.7	28.0±8.9	7.8±2.9
	0.5	12.2±0.7	9.0±0.45	27.3±7.8	13.9±2.2
	1.0	11.6±1.6	8.9±1.3	20.4±4.6	9.4±1.7
60	0	7.3±1.5	7.8±4.1	4.5±2.7	6.3±3.0
	0.1	11.9±2.0	8.9±3.2	8.3±3.6	7.3±2.9
	0.5	12.2±1.4	11.7±1.5	13.7±2.6	5.1±1.7
	1.0	12.3±1.9	12.5±1.3	14.2±3.3	6.7±1.1

老化时间/d	UVA 添加量/%	拉伸强度/MPa		断裂伸长率/%
老化时间/d	UVA 添加量/%	MD	TD	MD	TD
0	0	22.2±1.4	12.0±1.5	97.5±15.4	250.0±27.3
	0.1	24.3±1.7	11.1±1.2	79.7±6.5	292.9±24.9
	0.5	19.0±1.5	10.2±0.6	129.9±8.2	284.5±23.5
	1.0	25.2±1.5	11.3±1.1	78.4±8.7	266.0±10.4
30	0	9.4±1.8	4.5±0.9	20.6±4.5	5.2±0.8
	0.1	10.5±0.8	6.8±1.7	28.0±8.9	7.8±2.9
	0.5	12.2±0.7	9.0±0.45	27.3±7.8	13.9±2.2
	1.0	11.6±1.6	8.9±1.3	20.4±4.6	9.4±1.7
60	0	7.3±1.5	7.8±4.1	4.5±2.7	6.3±3.0
	0.1	11.9±2.0	8.9±3.2	8.3±3.6	7.3±2.9
	0.5	12.2±1.4	11.7±1.5	13.7±2.6	5.1±1.7
	1.0	12.3±1.9	12.5±1.3	14.2±3.3	6.7±1.1

老化时间/d	UVA 添加量/%	吐鲁番		海南
老化时间/d	UVA 添加量/%	透光率/%	雾度/%	透光率/%	雾度/%
0	0	99.2±0.2	31.8±2.6	99.2±0.2	31.8±2.6
	0.1	93.0±0.1	23.5±0.7	93.0±0.1	23.5±0.7
	0.5	92.1±0.2	36.7±1.1	92.1±0.2	36.7±1.1
	1.0	92.4±0.1	27.6±0.8	92.4±0.1	27.6±0.8
30	0	89.8±0.6	59.2±5.3	89.2±0.3	32.9±0.6
	0.1	89.0±0.2	57.3±3.5	88.9±0.1	36.4±0.5
	0.5	90.3±0.5	55.0±2.8	88.9±0.2	34.8±1.9
	1.0	89.2±1.0	58.4±4.7	89.7±0.3	32.1±1.5
60	0	90.0±0.7	74.7±2.0	89.2±0.8	48.1±0.4
	0.1	91.4±0.1	51.8±2.0	88.4±0.1	31.6±0.3
	0.5	90.3±0.1	63.2±2.0	86.8±0.1	38.1±1.3
	1.0	90.7±0.2	60.1±1.3	88.0±0.1	32.5±1.9