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Â¥Ö÷  ·¢±íÓÚ: 2013-10-30 12:32

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A. ʱ̬£ºµ±Ìáµ½±¾ÎÄ¡¢´Ëͼ¡¢´Ë±íµÈ˵Ã÷ÁË¡¢±í´ïÁËʲôʱҪÓÃÒ»°ãÏÖÔÚʱ£¬¶ø²»ÓÃÒ»°ã¹ýȥʱ¡£This paper describes The focus of this paper is Figure 1 shows Most of the common condensation polymers are listed in Table 1-1.

B. Êý£ºÔÚѧÊõÂÛÎÄÀÓÐʱºÜÄѹ˼°ÊýµÄÂß¼­¡£µ«Ò»°ã²»½«Âß¼­ÉϵÄÎÊÌâÊÓΪÓï·¨´íÎó¡£Ö»Ðë×¢ÒâÔÚÒ»¸ö¾ä×ÓÖеÄÊýºÍνÓﶯ´ÊµÄͳһ¼´¿É¡£µ¥¡¢¸´ÊýµÄÑ¡ÓÃÓÐһЩ·Ç¶¨ÐÔ¡¢µ«¿É¹©²Î¿¼µÄÇ÷Ïò£º

¡ô¡ôµ±º¬ÒâÉÏÇ¿µ÷¸´Êýʱ½¨ÒéÓø´Êý¡£The catalyst concentrations for the different reactions are different.Our research focuses on the syntheses and characterizations of a series of polycarbonates with different chemical structures.The physical and chemical properties of this compound have been studied.The chain lengths of the oligomers with different molecular weights are different.

¡ô¡ôµ±º¬ÒâÉϲ»Ç¿µ÷¸´Êýʱ¿ÉÓõ¥Êý»ò¸´Êý¡£Our research focuses on the synthesis of polycarbonates.The property of the compounds in group 1 is different from the property of the compounds in group 2.The chain length of the oligomers increases with increasing reaction time.

¡ô¡ôÔÚ±êÌ⡢С±êÌâÖлòÃèÊöÒ»ÀàÊÂÎï¡¢ÏÖÏóµÈ£¬Ìáµ½¾ßÌåÎïÖÊʱ³£Óø´Êý¡£¡¾Polyesters¡¿Polymers are macromolecules built up by large numbers of all molecules. The all molecules which combine with each other to form polymer molecules are termed monomers.ÔÚ±êÌ⡢С±êÌâ»òÃèÊöÒ»ÀàÊÂÎï¡¢ÏÖÏóµÈ£¬Ìáµ½³éÏó¸ÅÄîʱ¿ÉÓõ¥Êý¡¢Ò²¿ÉÓø´Êý¡£¡¾Step Copolymerization¡¿Newer Types of Step Polymerizations. This chapter will consider the characteristics of step polymerization in detail.

¡ô¡ôѧÊõÂÛÎÄ¡¢ÓйØѧÊõµÄ¿ÆÆÕÎÄÕÂÖеÄÃû´ÊµÄ¿ÉÊý»ò²»¿ÉÊýÌØÐԵĻ®·ÖÇø±ðÓÚ·ÇѧÊõÎÄÕ¡¶·ÇѧÊõÎÄÕÂÖеĿÉÊý»ò²»¿ÉÊýÌØÐÔ¿É´Ó×Öµä²éµ½¡·¡£ÒÔÏÂÊÇÔÚѧÊõÎÄÕÂÖÐͨ³£ÊÓΪ¿ÉÊýÃû´ÊµÄµ¥´Ê£º¡¶µ«ÔÚÒ»°ã×ÖµäÖÐËüÃÇ»òËüÃÇ×öijÖÖº¬Òå½âʱ¿ÉÄܱ»»®¹é²»¿ÉÊýÃû´Ê¡·¡£

application     development     consideration

composition     concentration     distribution

structure     length       weight

¡ô¡ôµ±Í¬Ê±Ìá¼°¼¸¸öͼ¡¢±í¡¢·½³ÌʽʱҪÓø´Êý(·Ö±ðµ¥¸öµØÌá¼°Ôò²»ÓÃ)£ºThe reaction rate constant can be calculated from Equations 2 and 3. The reaction rate constant can be calculated from Equation 2 and Equation 3. Figs. 4 and 5 show

C. ¹Ú´Ê£º

¡ô¡ôµ¥ÊýÃû´ÊÇ°Ò»°ãÒª¼Ó¹Ú´Ê£ºa , theµÈ£» µ«ÒÔÏÂÇé¿ö¿É²»¼Ó£º±íʾ²»ÌØÖ¸µÄ¡¢½Ï³éÏóµÄ¸ÅÄ

This chapter will consider the characteristics of step polymerization in detail. An understanding of the relative ease of cyclization or linear polymerization comes from a variety of sources.Different polymers are synthesized to yield various mechanical behaviors by the appropriate combinations of crystallinity, crosslinking, Tg, and Tm..µ«Ðè×¢ÒâÕâЩµ¥´ÊÇ°¼Ó¹Ú´ÊÒ²ÊǾ­³£¼ûµ½µÄ£¬ÕâÊÇÓÉËüÔÚ¾äÖеĺ¬Òå¾ö¶¨µÄ(ÈçÓÐÒ»¶¨µÄÌØÖ¸ÒâÒå)£ºPolyisoprene is a typical elastomer  it is amorphous, easily crossed, has a low Tg (-73C) and a high Tm (14C).

¡ô¡ôĿ¼¡¢±êÌâÖÐͨ³£Ê¡ÂÔ¹Ú´Ê£º

1     Introduction

1-1     Types of Polymers and Polymerizations



1-4 Molecular Weight

1-5 Physical State

ͼ¡¢±íµÄÌâÄ¿ÖÐÓÐʱ¿ÉÊ¡ÂÔ¹Ú´Ê£ºFig. 2-2 Second order plot of the self-catalyzed polyesterification of adipic acid with diethylene glycol at 166 C.Fig. 8 Dependence of the ease of cyclization on the size of the ring.»¯Ñ§Ò©Æ·¡¢»¯Ñ§ÎïÖÊǰͨ³£²»¼Ó¹Ú´Ê£ºThe polymerization is catalyzed by protonic or lewis acids although a wide variety of base catalysts such as calcium acetate and antimony trioxide can also be used.ͼÖеĺᡢ×Ý×ø±êµÄÃû³ÆÇ°²»¼Ó¹Ú´Ê¡£

D. ´óСд£ºÇë×¢ÒâÒÔϽṹµÄ´ó¡¢Ð¡Ð´£ºµ±Ìá¼°¾ßÌåµÚ¼¸Õ¡¢½Ú£»Í¼¡¢±í£»·½³Ìʽʱ£¬Ê׸ö×Öĸͨ³£Òª´óд¡£As discussed in Chapter 2, In Section 1.2, we As shown in Figure 1, The results are listed in Table 3.µ±²»Ö¸Ã÷Êǵڼ¸Õ¡¢½Ú£»Í¼¡¢±í£»·½³Ìʽʱ£¬Ê׸ö×ÖĸÈçÔÚ¾äÖÐͨ³£ÓÃСд¡£In the previous chapter, As shown in this figure,

E. Ëõд£ºÒÔÏÂÈ«ÃûºÍËõдÔÚÎÄÖÐͨ³£ÊÓΪͬµÈ£¬¿ÉÒÔ»¥»»¡£

Figure     Fig.     Figures       Figs.

Table       Tab.

Chapter     Chap.

Section     Sec.

Equation     Eq.     Equations     Eqs.

F. һЩ³£ÓôʻãÓ÷¨

¡ô¡ôresearch, study, investigate£ºresearch¿É×öÃû´Ê¡¢¶¯´Ê£¬µ«Í¨³£×öÃû´ÊÓ㬺ÜÉÙ¼ûµ½¶¯´ÊµÄÓ÷¨¡£¾äÖÐÐèÒª¶¯´Êʱ³£ÓÃstudy»òinvestigateÀ´±í´ï¡£

¡ô¡ôdetail/detailed£ºThe properties of this compound were studied in detail.//The detailed properties of this compound were studied.//The details of the properties of this compound were studied.

¡ô¡ôfollows/following£ºThe results are as follows: //We got following results:

¡ô¡ôincrease, decrease£º¾ù¿É×öÃû´ÊºÍ¶¯´Ê£¬We can observe an increase in the reaction rate.//The reaction rate increases.

¡ô¡ôfocus, concentrate£ºfocus: n. , v. The focus of this paper is This paper focuses on Our study focuses on We focus our study on Our study is focused on concentrate: v. We concentrate our study on Our study is concentrated on

¡ô¡ôeffect, affect£ºeffect: n. //affect: v.

¡ô¡ôcompose, consist£ºA is composed of B and C.//A consists of B and C.

¡ô¡ôincrease, improve£ºincrease: Ö÷ÒªÖ¸ÊýÖµÉϵÄÔö¼Ó¡£improve: Ö÷ÒªÖ¸ÐÔÖʵÄÔö¼Ó¡¢¸ÄÉÆ¡£

G. Ãû´ÊÐÞÊΣºÔÚѧÊõÎÄÕÂÖУ¬ºÜ¶àʱºò»áÓõ½Ö±½ÓÓ*************************û´Ê×öÐÞÊΣ¬¶ø²»ÓÃs »ò  of  µÄÐÎʽ¡£³£¼ûµÄÕâÀà´ÊÓУºreaction rate£»reaction rate constant£»reaction temperature£»reaction condition

molecular weight distribution

    H. ·Ö´ÊÐÞÊΣºthe reaction we studied£»the temperature used£»the nonlinearity observed¡£ËùÓиñ£º·ÇÈ˵ÄËùÓиñÓÃof, ¶ø²»ÓÃs ¡£
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