"Effect of nitrogen content on properties of natural rubber coagulated by papain"
Natural rubber with different nitrogen content (NR-P) was prepared by coagulation from fresh hevea latex with papain as granulation agent. The physical and chemical properties, curing cha-racteristics, physical and mechanical properties, compression fatigue heat build-up and dynamic mechanical prope...
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| Format: | Article |
| Language: | zho |
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Editorial Office of China Synthetic Rubber Industry
2023-01-01
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| Series: | Hecheng xiangjiao gongye |
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| Online Access: | http://hcxjgy.paperopen.com/oa/DArticle.aspx?type=view&id=202301005 |
| _version_ | 1828003914415341568 |
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| author | ZHANG Gui-mei, JIANG Shi-kuan, YAN Li, ZHU Ao, ZOU Jian-yun |
| author_facet | ZHANG Gui-mei, JIANG Shi-kuan, YAN Li, ZHU Ao, ZOU Jian-yun |
| author_sort | ZHANG Gui-mei, JIANG Shi-kuan, YAN Li, ZHU Ao, ZOU Jian-yun |
| collection | DOAJ |
| description | Natural rubber with different nitrogen content (NR-P) was prepared by coagulation from fresh hevea latex with papain as granulation agent. The physical and chemical properties, curing cha-racteristics, physical and mechanical properties, compression fatigue heat build-up and dynamic mechanical properties of NR-P were studied and compared with that of acid-coagulated natural rubber (NR-A).The results showed that with decrease of nitrogen content, the initial plasticity of NR-P decreased first and then leveled off, while the plasticity retention index decreased slightly. The curing rate of the rubber compound with NR-P became faster, the modulus at 300%, tensile strength first increased and then decreased slightly. Besides, the heat build-up and rolling resistance of natural rubber vulcanizate also showed a decreasing trend. Compared with NR-A, the nitrogen content of NR-P was lower, but the initial plasticity was higher and plasticity retention index was slightly lower, and the curing rate and tensile strength were also better than that of NR-A. When the mass fraction of nitrogen of natural rubber was in the range of 0.18% to 0.23%, NR-P compounds exhibited faster curing rate, better mechanical properties, lower compression fatigue heat build-up and dynamic mechanical properties.
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| first_indexed | 2024-04-10T07:06:18Z |
| format | Article |
| id | doaj.art-8b83c7fd1f04417d92bad53cbf6946a8 |
| institution | Directory Open Access Journal |
| issn | 1000-1255 |
| language | zho |
| last_indexed | 2024-04-10T07:06:18Z |
| publishDate | 2023-01-01 |
| publisher | Editorial Office of China Synthetic Rubber Industry |
| record_format | Article |
| series | Hecheng xiangjiao gongye |
| spelling | doaj.art-8b83c7fd1f04417d92bad53cbf6946a82023-02-27T08:04:05ZzhoEditorial Office of China Synthetic Rubber IndustryHecheng xiangjiao gongye1000-12552023-01-01461192210.19908/j.cnki.ISSN1000-1255.2023.01.0019"Effect of nitrogen content on properties of natural rubber coagulated by papain"ZHANG Gui-mei, JIANG Shi-kuan, YAN Li, ZHU Ao, ZOU Jian-yun0Yunnan Institute of Tropical Crops, Jinghong 666100, ChinaNatural rubber with different nitrogen content (NR-P) was prepared by coagulation from fresh hevea latex with papain as granulation agent. The physical and chemical properties, curing cha-racteristics, physical and mechanical properties, compression fatigue heat build-up and dynamic mechanical properties of NR-P were studied and compared with that of acid-coagulated natural rubber (NR-A).The results showed that with decrease of nitrogen content, the initial plasticity of NR-P decreased first and then leveled off, while the plasticity retention index decreased slightly. The curing rate of the rubber compound with NR-P became faster, the modulus at 300%, tensile strength first increased and then decreased slightly. Besides, the heat build-up and rolling resistance of natural rubber vulcanizate also showed a decreasing trend. Compared with NR-A, the nitrogen content of NR-P was lower, but the initial plasticity was higher and plasticity retention index was slightly lower, and the curing rate and tensile strength were also better than that of NR-A. When the mass fraction of nitrogen of natural rubber was in the range of 0.18% to 0.23%, NR-P compounds exhibited faster curing rate, better mechanical properties, lower compression fatigue heat build-up and dynamic mechanical properties. http://hcxjgy.paperopen.com/oa/DArticle.aspx?type=view&id=202301005natural rubberpapainnitrogen contentcuring characteristicsphysical and mechanical propertycompression fatigue heat build-updynamic mechanical property |
| spellingShingle | ZHANG Gui-mei, JIANG Shi-kuan, YAN Li, ZHU Ao, ZOU Jian-yun "Effect of nitrogen content on properties of natural rubber coagulated by papain" Hecheng xiangjiao gongye natural rubber papain nitrogen content curing characteristics physical and mechanical property compression fatigue heat build-up dynamic mechanical property |
| title | "Effect of nitrogen content on properties of natural rubber coagulated by papain" |
| title_full | "Effect of nitrogen content on properties of natural rubber coagulated by papain" |
| title_fullStr | "Effect of nitrogen content on properties of natural rubber coagulated by papain" |
| title_full_unstemmed | "Effect of nitrogen content on properties of natural rubber coagulated by papain" |
| title_short | "Effect of nitrogen content on properties of natural rubber coagulated by papain" |
| title_sort | effect of nitrogen content on properties of natural rubber coagulated by papain |
| topic | natural rubber papain nitrogen content curing characteristics physical and mechanical property compression fatigue heat build-up dynamic mechanical property |
| url | http://hcxjgy.paperopen.com/oa/DArticle.aspx?type=view&id=202301005 |
| work_keys_str_mv | AT zhangguimeijiangshikuanyanlizhuaozoujianyun effectofnitrogencontentonpropertiesofnaturalrubbercoagulatedbypapain |