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荧光增白剂厂家提升PVC耐温性的窍门


网址:http://www.scvc8.com  时间:2019-05-17 14:55:55

  1 VC共聚物
  1 VC Copolymer
  VC(氯乙烯)与其它单体共聚树脂的组成中若含有极性或大基团的组分,则共聚物的热变形温度相应增加,耐热性比PVC好,制得耐热制品。PVC的软化温度为78℃,而共聚物氯乙烯-偏氯乙烯、氯乙烯一甲基丙烯酸甲酯 、氯乙烯一丙烯睛的软化温度分别为100~130、85 、140~150℃。
  If the composition of VC (vinyl chloride) and other monomer copolymer resins contains polar or large groups, the thermal deformation temperature of the copolymer increases correspondingly, and the heat resistance of the copolymer is better than that of PVC. The softening temperatures of PVC were 78 C, while those of copolymer vinyl chloride-vinylidene chloride, vinyl chloride-methyl methacrylate and vinyl chloride-acrylonitrile were 100-130, 85 and 140-150 C, respectively.
  2 PVC氯化
  2 PVC chlorination
  氯化聚氯乙烯是由PVC树脂氯化而制得的,其含氯量为62%~68%。氯化聚氯乙烯可在100℃下连续使用(比PVC高20~35℃),最高使用温度可达100~ 105℃。且化学稳定性、难燃性、耐寒性均优于PVC。但氯化设备防腐要求较严.树脂不易加工,冲击韧性较差又制约了它的应用和发展。
  Chlorinated polyvinyl chloride (CPVC) is prepared by chlorination of PVC resins with chlorine content of 62%~68%. The chlorinated polyvinyl chloride can be continuously used at 100 ~35 C higher than PVC, and the maximum temperature can reach 100~105 C. The chemical stability, flammability and cold resistance of PVC are better than those of PVC. However, the requirements of Anticorrosion for chlorination equipment are stricter. Resin is not easy to process and its impact toughness is poor, which restricts its application and development.
  3 PVC交联
  3 PVC crosslinking
  交联PVC可用辐射交联法和化学交联法来制取。交联后的PVC制品比普通PVC制品机械强度高、尺寸稳定性好、耐热变形、耐磨、耐化学药品等性能优良。辐射交联电线可在100~110℃下连续使用。
  Crosslinked PVC can be prepared by radiation crosslinking and chemical crosslinking. The crosslinked PVC products have higher mechanical strength, better dimensional stability, heat resistance, abrasion resistance and chemical resistance than ordinary PVC products. Radiation cross-linking wires can be used continuously at 100-110 C.
                              荧光增白剂厂家
  4 PVC与其它聚合物共混
  4 PVC Blends with Other Polymers
  PVC与其它聚合物按一定比例混合,共混物的性能(充分相容)与PVC相比有所提高。因为相容性的两种聚合物混炼后,可以达到分子级互融,形成单相结构,从而使共混物性能得到补充和加强,如PVC/PS,PVC/PE,PVC/CPVC等。
  When PVC is mixed with other polymers in a certain proportion, the properties (full compatibility) of the blends are improved compared with that of PVC. Because the compatibility of the two polymers can be blended at the molecular level to form a single-phase structure, so that the properties of the blends can be supplemented and strengthened, such as PVC/PS, PVC/PE, PVC/CPVC and so on.
  5 加入耐热改性剂
  5. Adding heat-resistant modifier
  耐热改性剂是为了提高PVC耐热性而研发生产的具有较高耐热性的一类聚合物。(1)聚戊二酰亚胺:由聚甲基丙烯酸甲酯与CH3NH4反应制得。(2)SMA(苯乙烯一马来酐共聚物)是美国厂家推出的较好的PVC耐热改性剂。(3)HT-510(日)是丙烯酸系列亚胺基共聚物,(4)S700N是α-甲基苯乙烯-丙烯腈共聚物。(5)ABS类耐热改性剂:A15、A50B、A10(日本钟渊)(6)MBS类耐热改性剂:三菱H602、605、632.(7)另外,还有ELIX200、300;GE Blendex 702、703、586、975等。
  Heat-resistant modifier is a kind of polymer with high heat resistance developed and produced to improve the heat resistance of PVC. (1) Polyglutarimide: Prepared by the reaction of polymethyl methacrylate with CH3NH4. (2) SMA (styrene-maleic anhydride copolymer) is a better heat-resistant modifier for PVC introduced by American manufacturers. (3) HT-510 (day) is an imino copolymer of acrylic acid series, (4) S700N is a copolymer of alpha-methylstyrene-acrylonitrile. (5) ABS heat-resistant modifiers: A15, A50B, A10 (Zhongyuan, Japan) (6) MBS heat-resistant modifiers: Mitsubishi H602, 605, 632. (7) In addition, there are ELIX200, 300; GE Blendex 702, 703, 586, 975 and so on.
  6 PVC中添加无机填料
  6. Adding inorganic fillers to PVC
  加入一定量填料后.能提高PVC耐热性。常用的填料有:重质碳酸钙、轻质碳酸钙、沉淀碳酸钙、锻烧陶上、硫酸钡、赤泥、钛自粉等。
  The heat resistance of PVC can be improved by adding a certain amount of filler. The commonly used fillers are: heavy calcium carbonate, light calcium carbonate, precipitated calcium carbonate, calcined pottery, barium sulfate, red mud, titanium self-powder, etc.
  7 PVC中加入玻璃纤维
  7. Adding glass fibre to PVC
  PVC中加入20%~30%玻璃纤维,在不加(或少加)增塑剂的情况下,其耐热性可提高到100℃以上。特别是长纤维增强的PVC,其热变形温度增加更为明显。
  By adding 20%~30% glass fiber into PVC, the heat resistance of PVC can be increased to more than 100 C without (or with) plasticizer. Especially for long fiber reinforced PVC, the increase of thermal deformation temperature is more obvious.
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