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COATINGS & LININGS FIGURE 1
ing thermal stability. The thermal stabil- ity of samples improved with the addition WN 5++ M[XMKQITTa \PM ?8=: ÅTU
Mechanical Properties of WPUR Films
.QO]ZM [PW_[ \PM \MV[QTM [\ZMVO\P WN
?8=: ÅTU[ .ZWU .QO]ZM _M SVM_ the tensile strength of the modified ?8=: ÅTU[ QVKZMI[ML [QOVQÅKIV\Ta KWU- XIZML _Q\P \PM ]VUWLQÅML WVM JMKI][M MCC has a straight rigid-chain structure and produced physical entanglement _Q\P \PM UWTMK]TIZ KPIQV[ WN ?8=: Another reason was the fact that molecu- TIZ KPIQV[ KZW[[ TQVSML _Q\P \PM ILLQ\QWV WN 5++ ) KMZ\IQV LMOZMM WN KZW[[ TQVSQVO can increase the interaction between polymer chains.
Water Absorption Measurements Figure 4 shows that water absorption
reduced greatly with the addition of MCC. The reason was that the formation WN I \PZMM LQUMV[QWVIT VM\_WZS [\Z]K\]ZM prevented water molecules from entering.
UWLQÅML Ja 5++ ?M KPIVOML \PM WZLMZ of adding MCC and the hydrophilic KZW[[ TQVSQVO \QUM \W XZMXIZM \PZMM SQVL[ WN UWLQNQML ?8=:
[QbM +WUXIZML _Q\P ]VUWLQÅML MU]T- [QWV \PM [\IJQTQ\a WN UWLQÅML WVM[ JM- KIUM _WZ[M
April 2012 MATERIALS PERFORMANCE 37
Zeta potential of different WPUR emulsions. FIGURE 2