Journal of Textile Research ›› 2022, Vol. 43 ›› Issue (06): 1-8.doi: 10.13475/j.fzxb.20220104008

• Manufacture and Application of High Performance Flexible Textile Composites •     Next Articles

Photo oxidative aging behavior and evaluation of polyvinyl chloride membrane structural composites

GUO Shanshan1, HAO Enquan2, LI Hongjie2, WANG Linlin1, JIANG Jinhua1(), CHEN Nanliang1   

  1. 1. Engineering Research Center of Technical Textiles, Ministry of Education, Donghua University,Shanghai 201620, China
    2. Zhejiang MSD Group Share Co., Ltd., Jiaxing, Zhejiang 314400, China
  • Received:2022-01-17 Revised:2022-03-28 Online:2022-06-15 Published:2022-07-15
  • Contact: JIANG Jinhua E-mail:jiangjinhua@dhu.edu.cn

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Abstract:

In order to investigate the different photo-oxygen aging behavior of membrane coated warp knitted and woven structure composites, accelerated aging behavior of polyester warp knitted and woven fabric reinforced polyvinyl chloride (PVC) membrane composites was studied under ultraviolet irradiation. Six types of fabrics were selected for making the composites, and the aging was characterized by the mechanical properties of polyester yarn. The test results show that the coating membrane has a good protective effect on the yarns in the fabrics. The initial modulus of warp knitted fabric is higher than that of woven fabric, but the retention rate of breaking strength is lower. At the irradiation energy of 82.08×103 kJ/m2, the fracture strength retention rate of the single-face warp-knitted membrane structural composite with both 24 course and wale densities is only 62.4%, and the coating of the single-face membrane structural material is no longer effective in protecting the substrate fabric with the coating membrane granulized and clustered. However, the retention rates of breaking strength of the five double-faced samples are all above 85%. Within the irradiation energy range, the coated surface becomes rough, with few grooves appearing, demonstrating good anti-photo oxygen aging performance.

Key words: polyvinyl chloride membrane, composite, oxidative aging, ultraviolet irradiation energy, breaking strength, carbonyl index

CLC Number: 

  • TS186

Tab.1

Specifications of samples"

试样
编号		 针织物密度 机织物密度 复合材料
横密 纵密 经向 纬向 厚度/
mm		 面密度/
(g·m-2)
K1 18 18 — — 0.41 365.10
K2 24 24 — — 0.36 436.53
K3 36 36 — — 0.51 651.16
W1 — — 72 72 0.50 635.73
W2 — — 90 90 0.64 812.16
W3 — — 118 118 0.75 931.50

Tab.2

Irradiation energy of samples at different time"

老化时
间/h		 辐射强度/
(W·m-2)		 累积辐射能/
(103 kJ·m-2)
0 0.0 0.00
200 5.3 16.26
400 5.2 32.18
600 5.3 49.25
800 5.4 65.34
1 000 5.2 82.08

Fig.1

Surface SEM images of K1 and W1 and samples after 1 000 h photo-oxygen aging treatment.(a) K1 original surface(×500);(b) K1 surface after 1 000 h(×1 000);(c) K2 surface after 1 000 h(×1 000);(d) K3 surface after 1 000 h (×500);(e) W1 original surface(×300);(f) W1 surface after 1 000 h(×200);(g) W2 surface after 1 000 h(×500);(h) W3 surface after 1 000 h(×500)"

Fig.2

Section SEM images of K1, K2 and W1 and samples after 1 000 h photo-oxygen aging treatment. (a) K1 original section(×300); (b) K1 section after 1 000 h(×300);(c) K2 original section(×20);(d) K3 section after 1 000 h(×300);(e) W1 original section(×300);(f) W1 section after 1 000 h (×300);(g) W2 section after 1 000 h (×400);(h) W3 section after 1 000 h(×400)"

Fig.3

Infrared spectra of 6 samples after 1 000 h photo-oxygen aging treatment"

Fig.4

Molecular formula of PVC and its changes under photo-oxygen aging condition"

Fig.5

FT-IR spectra of carbonyl peak segment of 6 samples after photo-oxygen aging 1 000 h"

Fig.6

Curve of carbonyl index and irradiation energy"

Fig.7

Stress-strain curve of polyester yarn before and after aging"

Fig.8

Stress-strain curves of longitudinal of K1(a), K2(b), K3(c), W1(d), W2(e) and W3(f) and transverse of K1(g), K2(h), K3(i), W1(j), W2(k) and W3(l) before and after photo-oxygen aging"

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