Effect on Flexural and Tensile Modulus

The same coupling agents, both maleated polyolefins and silanes, affect flexural modulus of WPC quite differently, from decreasing through practically no effect, to increase up to 20-40% (Tables 5.7, 5.11, and 5.12). 

With respect to tensile modnlns, of 11 cases in Table 5.7, five maleated polyolefins show decrease in the property (an Epolene, maleated polypropylenes and a Polybond), in five cases there was practically no effect (within 10% of the control), and in only one case an increase by 24% was observed (Polybond 3029). 

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