。沉溺™物語。

Select one of the following compounds: nitric acid, urea, styrene, terephthalic acid, or isopropyl alcohol.  Write a report describing the raw materials used to produce this chemical, the production method, the annual production rate, market price for the chemical, and types and amounts of by-products and wastes.

我會放檔案上來，如怕會中毒的...可直接COPY我所PO上的

只是圖的部分沒有辦法直接在樂多系統顯示

SO...圖~就你自己想辦法嚕。

1 Mechanical Properties of Solid Polymers
The properties of polymers are required firstly to select a material which enables desired
performance of the plastics component under conditions of its application. Furthermore
they are also essential in design work to dimension a part from a stress analysis or to
predict the performance of a part under different stress situations involved. Knowledge of
polymer properties is, as already mentioned in the preface, a prerequisite for designing and
optimizing polymer processing machinery.
In addition to the physical properties there are certain properties known as
performance or engineering properties which correlate with the performance of the
polymer under varied type of loading and environmental influences such as impact,
fatigue, high and low temperature behavior and chemical resistance. The following
sections deal with the physical as well as important performance properties of polymers.
1.1 Ideal Solids
Ideal elastic solids deform according to Hookean law which states that the stress is directly
proportional to strain. The behavior of a polymer subjected to shear or tension can be
described by comparing its reaction to an external force with that of an elastic solid under
load. To characterize ideal solids, it is necessary to define certain quantities as follows [3]:
1.2 Tensile Properties
The axial force Fn in Fig. 1.1 causes an elongation A/ of the sample of diameter d0 and
length I0 fixed at one end. Following equations apply for this case:
Engineering strain:
(1.2.1)

學校新通過的修習辦法

有四項學程：防災科技，微奈米科技工程，綠色科技，居住環境與休閒空間學程