六合彩走势图

新闻资讯

行业资讯

当前位置: 网站首页 > 新闻资讯 > 行业资讯
  • 选用的热稳定剂要具备哪些功能?
  • 本站编辑:巩义市白云塑胶助剂有限公司发布日期:2018-08-31 16:39 浏览次数:

l2-1F525134126-50_600_400.jpg

稳定剂的作用机理,若防止或延缓PVC的热降解,需要:消除PVC中热解的引发源,如PVC中烯丙基氯和不饱和键;消除所有对热降解有催化作用的物质,如由PVC上解脱下来的氯化氢等。
In order to prevent or delay the thermal degradation of PVC, it is necessary to eliminate the initiator of the pyrolysis of PVC, such as allyl chloride and unsaturated bond in PVC, and remove all catalytic substances, such as hydrogen chloride from PVC.
所选择和使用的热稳定剂应具有以下的功能:
The heat stabilizer selected and used should have the following functions:
1、能置换链中存在的活泼原子(如,烯丙基氯原子),形成更为稳定的化学键以减小脱HCl的可能性;
1. It can replace the active atoms in the chain (e.g. allyl chloride atoms) to form more stable chemical bonds to reduce the possibility of HCl removal.
2、能迅速吸收HCl,抑制其自动催化作用;
2. It can absorb HCl rapidly and inhibit its autocatalytic effect.
3、能与PVC中存在的双键加成而生成饱和的高分子链;
3, it can form a saturated polymer chain with the addition of double bonds in PVC.
4、能抑制聚烯结构的氧化与交联;
4. It can inhibit the oxidation and crosslinking of polyene structure.
5、对PVC有亲和力,而且是无毒或低毒的;
5. It has affinity for PVC and is non-toxic or low toxic.
6、不与PVC中的添加剂,如增塑剂、填充剂等发生作用。
6, do not interact with additives in PVC, such as plasticizers and fillers.
目前使用的热稳定剂并不能完全满足上述的要求,所以在使用过程中必须结合使稳定性要求选用不同性能的热稳定剂。有时还必须与抗氧剂,光稳定剂等添加剂配合使用,以减小氧化老化的可能
At present, the heat stabilizers used can not fully meet the above requirements, so in the course of use must be combined with the stability requirements to select different properties of heat stabilizers. Sometimes it must be used in conjunction with antioxidants, light stabilizers and other additives to reduce the possibility of oxidative aging.

友情链接:366彩票开奖  六合彩票充值  六合彩票网址  六合彩票娱乐  六合彩票计划软件  六合彩票网  366彩票网站  366彩票  六合彩票  366彩票走势  366彩票平台  六合彩票app  366彩票网址  六合彩票网站  366彩票官网  六合彩票开奖  

免责声明: 本站资料及图片来源互联网文章,本网不承担任何由内容信息所引起的争议和法律责任。所有作品版权归原创作者所有,与本站立场无关,如用户分享不慎侵犯了您的权益,请联系我们告知,我们将做删除处理!