| 促进剂ZDTP及ZDTP/ZMBT并用对天然胶乳性能影响的研究 |
| Effects of Accelerators ZDTP and ZDTP/ZMBT on the Properties of NR Latex |
| 投稿时间：2015-12-07 修订日期：2015-12-07 |
| DOI： |
| 中文关键词: 烷基二硫代磷酸锌、2-硫醇基苯并噻唑锌、胶体性能、硫化特性、物理机械性能 |
| 英文关键词: Zinc Dialkylphosphorodithiloate,zinc mercaptobenzothiazole,colloidal properties,curing characteristics,mechanical properties |
| 基金项目:国家自然科学(51163006) |
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| 中文摘要: |
| 烷基二硫代磷酸锌(ZDTP)属无亚硝胺硫化促进剂,具有优越的抗硫化返原性,与橡胶相容性好且不易喷霜,有很好的应用前景。本文采用硫磺硫化体系,研究了促进剂ZDTP及ZDTP/2-硫醇基苯并噻唑锌(ZMBT)并用对配合天然胶乳的粘度、热稳定度、机械稳定度及配合胶乳胶膜硫化硫化特性、硫化胶膜力学性能的影响。试验结果表明：1.促进剂ZDTP对配合胶乳的胶体性能及贮存性能有较大影响,其所制备的配合胶乳的粘度大、热稳定度和机械稳定度低,随贮存时间的延长,配合胶乳的粘度增加较快,机械稳定度显著降低；促进剂ZDTP单用对配合胶膜硫化促进作用较小,硫化胶膜的硫化程度低,其拉伸强度等力学性能较小； 2.促进剂ZDTP/ZMBT并用比对配合胶乳的胶体性能影响较大,随ZDTP/ZMBT中ZDTP比例的增加,胶乳的粘度逐渐增大,热稳定度逐渐减小,当促进剂用量为1.5份时,机械稳定度在ZDTP/ZMBT并用比为0.75:0.75时最大；贮存时间对促进剂ZDTP/ZMBT并用制得的配合胶乳的胶体性能影响较小,随贮存时间的延长,配合胶乳的粘度、热稳定度和机械稳定度变化均较小；促进剂ZDTP/ZMBT并用对配合胶膜有较大的硫化促进作用,配合胶膜硫化速度较快,其所制备的硫化胶膜的交联密度高,其拉伸强度较高,ZDTP与ZMBT具有很好的协同作用。 |
| 英文摘要: |
| Zinc Dialkylphosphorodithiloate(ZDTP) is a friendly environmental accelerator without producing nitrosamine during sulfur curing process. ZDTP has a good application prospect with the advantages of superior anti-reversion, good compatibility with NR and not easy to bloom. In the study, we investigated the effects of ZDTP and ZDTP/zinc mercaptobenzothiazole(ZMBT) on the viscosity、mechanical stability and thermal stability properties of NR latex, on the curing characteristics of NRL films and on the mechanical characteristics of vulcanized NRL films in sulphur curing system. The Results show that, 1. ZDTP has great influence on the colloidal properties and storage properties of NRL: the NRL prepared by ZDTP has high viscosity, low mechanical stability and thermal stability. With the increase of storage time, the viscosity increaseSgreatly and the mechanical stability decrease significantly. ZDTP has a poorSacceleratingSeffect on NRL films and theScross-linkSdegree of vulcanized NRL films are low, the mechanical properties of of vulcanized NRL films are poor. 2. The blending ratio of ZDTP/ZMBT has great influence on the colloidal properties of NRL: the viscosity increase gradually and the thermal stability decrease slightly with the increase of ZDTP, the mechanical stability reach the peak at the blending ratio of ZDTP/ZMBT of 0.75:0.75; the storage time has slight influence on the colloidal properties. With the increase of the storage time, the viscosity、thermal stability、mechanical stability change slightly. ZDTP has a good acceleratingSeffect on NRL films, the crosslinkingSdensity and the mechanical properties of vulcanized NRL films are high. From the results, we can find that ZDTPShasSgoodScooperationSwith ZMBT. |
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