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首页> 外文学位 >Effect of tackifiers on the autohesion of uncrosslinked styrene-butadiene rubber.
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Effect of tackifiers on the autohesion of uncrosslinked styrene-butadiene rubber.

机译：增粘剂对未交联的丁苯橡胶自粘性的影响。

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摘要

The effect of a terpene resin tackifier, a phenolic resin tackifier, and a processing oil on the rheology and autohesion of a styrene-butadiene elastomer (SBR) was examined. Relative autohesion, G;Solution cast SBR/tackifier blends differed from mechanically mixed blends in two important ways. First, autohesion was strongly influenced by the composition and morphology of a resin-rich surface layer. Second, phase separation limited the amount of tackifier dissolved in the SBR and allowed the bulk region to remain rubbery at higher resin concentrations. For a partially soluble terpene resin, the enhanced resin concentration at the surface caused a large increase in autohesion at low resin concentrations. At higher resin concentrations, autohesion decreased sharply and became strongly dependent on contact pressure. Autohesion of solution cast blends depended strongly on sample preparation conditions and was difficult to control.;Adhesion between SBR and a polyisobutylene elastomer (PIB) was also examined. Although SBR and PIB are incompatible, a strong interfacial bond was formed. During bond separation deformation was confined primarily to the softer SBR layer. Addition of a phenolic resin to the SBR increased the cohesive strength of the SBR and adhesion to PIB in about the same proportion.
机译：研究了萜烯树脂增粘剂，酚醛树脂增粘剂和加工油对苯乙烯-丁二烯弹性体（SBR）的流变性和自粘性的影响。相对自粘性G；溶液浇铸的SBR /增粘剂共混物与机械混合的共混物有两个重要方面。首先，自粘力受到富含树脂的表面层的组成和形态的强烈影响。第二，相分离限制了溶解在SBR中的增粘剂的数量，并允许主体区域在较高的树脂浓度下保持橡胶状。对于部分可溶的萜烯树脂，在低树脂浓度下，表面树脂浓度的提高导致自粘性的大幅提高。在较高的树脂浓度下，自粘力急剧下降，并强烈依赖于接触压力。溶液浇铸共混物的自粘力在很大程度上取决于样品制备条件，并且难以控制。;还检查了SBR和聚异丁烯弹性体（PIB）之间的粘着力。尽管SBR和PIB不兼容，但形成了牢固的界面键。在键分离过程中，变形主要局限于较软的SBR层。向SBR中添加酚醛树脂以大约相同的比例增加了SBR的内聚强度和对PIB的粘合性。

著录项

  • 作者

    Roberts, Gary Dennis.;

  • 作者单位

    The University of Akron.;

  • 授予单位 The University of Akron.;
  • 学科 Polymer chemistry.
  • 学位 Ph.D.
  • 年度 1991
  • 页码 262 p.
  • 总页数 262
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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