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首页> 外文期刊>Journal of Applied Polymer Science >Compounding of Poly(dimethyl siloxane )to Reduce Tack in Natural Rubber
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Compounding of Poly(dimethyl siloxane )to Reduce Tack in Natural Rubber

机译：聚二甲基硅氧烷的配混以减少天然橡胶中的粘性

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摘要

Tack in natural rubber latex was reduced by compounding poly(dimethyl siloxane)(PDMS) emulsion in concentrated latex.Sheet and dipped film surfaces were examined with Fourier transform infrared spectroscopy using attenuated total reflection (FTIR-ATR) and by contact angle measurements.Autohesive tack and tensile properties were also determined,For both sheet and dipped ,FTIR-ATR showed that the PDMS concentration was higher at the glass surface than at the air surface . The contact angle of ethylene glycol on the rubber decreased with increasing PDMS content.Autohesive tack for sheet and dipped film also decreased with increasing PDMS amount;however,annealing for 1 week at 70 deg C in air did cause tack to rise in the sheets.The rubber surface could be made nonadhesive by addition of sufficient PDMS.PDMS caused a decrease in tensile strength for the sheet,especially after annealing;however,PDMS did not cause a substantial decrease in percentage elongation for the sheets.except at relatively high PDMS contents,The tensile strength and percentage elongation for dipped film was not affected by PDMS over the much more limited DMS concentration range studied.
机译：通过在浓缩胶乳中混合聚二甲基硅氧烷（PDMS）乳液，可减少天然胶乳中的粘性。使用衰减全反射（FTIR-ATR）并通过接触角测量，通过傅立叶变换红外光谱法对片材和浸渍膜的表面进行检测。还测定了粘性和拉伸性能。对于片材和浸胶，FTIR-ATR表明，玻璃表面的PDMS浓度高于空气表面的PDMS浓度。乙二醇在橡胶上的接触角随PDMS含量的增加而降低。片材和浸渍膜的自粘粘性也随PDMS含量的增加而降低;但是，在70摄氏度的空气中退火1周确实会使片材的粘性提高。可以通过添加足够的PDMS使橡胶表面不粘连.PDMS会导致片材的拉伸强度降低，特别是在退火之后;但是，PDMS不会导致片材的伸长百分比显着降低。在更有限的DMS浓度范围内，PDMS不会影响浸渍膜的拉伸强度和延伸率。

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