POLYMERS FROM RENEWABLE SOURCES .5. MYRCENE-BASED POLYOLS AS RUBBER-TOUGHENING AGENTS IN GLASSY POLYURETHANES

被引:27
作者
CAWSE, JL [1 ]
STANFORD, JL [1 ]
STILL, RH [1 ]
机构
[1] UNIV MANCHESTER,INST SCI & TECHNOL,DEPT POLYMER SCI & TECHNOL,WOLFSON POLYMER RES UNIT,POB 88,MANCHESTER M60 1QD,LANCS,ENGLAND
关键词
POLYMERS; -; Additives; RUBBER; SYNTHETIC; Applications;
D O I
10.1016/0032-3861(87)90187-X
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
A reactive liquid rubber based on hydroxy-funcionalized polymyrcene was used to modify a highly-crosslinked, glassy polyurethane network. During the polymerization, the products formed from the reacting liquid rubber and the polyurethane matrix components become incompatible leading to precipitation of the rubber as a discrete particulate phase. Phase-separation in the resultant rubber-modified polyurethanes is essentially complete, and the materials possess improved stress-strain and impact properties relative to the unmodified network, without reduction of the glass transition temperature (155 degree C) of the network. The mechanisms of energy dissipation accounting for the toughness changes are reviewed and compared with those observed in epoxy resins modified by polybutadiene-based liquid rubbers.
引用
收藏
页码:368 / 374
页数:7
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