- 摘 要
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(1 同濟大學土木工程學院， 上海 200092； 2 上海建科工程咨詢有限公司， 上海 200032；3 中國建筑第八工程局有限公司， 上海 200135)
［摘要］對6組自然老化下的PVDF膜材和1組人工加速老化試驗下的Ferrari 1202T膜材的主要力學性能數據進行了匯總，包括單軸抗拉強度、斷裂延伸率、撕裂強度以及單軸和雙軸楊氏模量，在此基礎上對經歷了自然老化的第6組膜材補充了人工加速老化試驗并測得其抗拉強度。通過對比第1，2組自然老化膜材的試驗結果，研究了環(huán)境因素對PVDF膜材老化性能的影響；研究和對比了PVDF膜材在自然老化與人工加速老化試驗下力學性能的變化規(guī)律，基于性能保持率的等效時間為表征指標，驗證了互易定律的失效性。采用兩種經典擬合方法估算PVDF膜材的使用壽命，結果表明PVDF膜材的壽命以等效時間表示為1860h，換算成自然老化時間后，第1，2，3，4，6組膜材的壽命分別為18年、20年、17年、19年和19年，最終為膜結構的理論分析、設計計算和壽命預測模型的建立積累了重要數據。
［關鍵詞］聚偏二氟乙烯（PVDF）膜材；自然老化；人工加速老化；力學性能；互易定律
中圖分類號：TU383 文獻標識碼：A文章編號：1002-848X(2021)23-0048-06
Study on the correlation of mechanical properties of PVDF membrane materials under natural aging and accelerated aging
YANG Bin1, WU Menglin1, L- Bing2, YU Shaole3, SHANG Yingying1, HUO Zhenting1, ZHANG Qilin1
(1 School of Civil Engineering, Tongji University, Shanghai 200092， China； 2 Shanghai Jianke Engineering Consulting Co., Ltd., Shanghai 200032， China； 3 China Construction Eighth Engineering Division Co., Ltd., Shanghai 200135， China)
Abstract: The main mechanical performance data of 6 groups of PVDF membrane materials under natural aging and 1 group of Ferrari 1202T membrane materials under artificial accelerated aging test were summarized, including uniaxial tensile strength, elongation at break, tearing strength and uniaxial and biaxial Young′s modulus. On this basis, the artificial accelerated aging test was added to the sixth group of PVDF membrane materials after natural aging, and the tensile strength was measured. By comparing the test results of the first and second groups of natural aging membrane materials, the influence of environmental factors on the aging performance of PVDF membrane materials was studied. The changes of mechanical properties of PVDF membrane materials under natural aging and artificial aging tests were compared. The equivalent time based on the performance retention rate is the characterization index, and the invalidity of the reciprocity law was verified. Two classical fitting methods were used to estimate the service life of membrane material. The results show that the service life of membrane material is expressed as 1 860 hours in equivalent time. When converted to natural aging time, the service lives of groups 1, 2, 3, 4 and 6 are 18 years, 20 years, 17 years, 19 years and 19 years respectively. Finally, important data has been accumulated for the theoretical analysis, design calculation and life prediction model establishment of the membrane structure.
Keywords:PVDF membrane material； natural aging； artificial accelerated test； mechanical property； reciprocity law
*國家自然科學基金資助項目（51778458）。
作者簡介：楊彬，博士，副教授，博士生導師，Email:yangbin@#edu.cn； 通信作者：吳夢琳，碩士研究生，Email：1932522@#edu.cn。
